- Enantioselective addition of organozinc reagents to ketones catalyzed by grafted isoborneolsulfonamide polymers and titanium isopropoxide
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The catalytic enantioselective addition of different organozinc reagents, such as diethylzinc, or in situ generated phenylzinc derivatives to simple aryl methyl ketones was accomplished using titanium tetraisopropoxide and a polymeric ligand grafted with
- Forrat, Vicente J.,Ramon, Diego J.,Yus, Miguel
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Read Online
- Influence of Chain Rigidity and Dielectric Constant on the Glass Transition Temperature in Polymerized Ionic Liquids
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Polymerized ionic liquids (PolyILs) are promising candidates for a wide range of technological applications due to their single ion conductivity and good mechanical properties. Tuning the glass transition temperature (Tg) in these materials con
- Bocharova,Wojnarowska,Cao, Peng-Fei,Fu,Kumar,Li, Bingrui,Novikov,Zhao,Kisliuk,Saito,Mays, Jimmy W.,Sumpter,Sokolov
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Read Online
- Molded, high surface area polymer electrolyte membranes from cured liquid precursors
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Polymer electrolyte membranes (PEMs) for fuel cells have been synthesized from easily processable, 100% curable, low molecular weight reactive liquid precursors that are photochemically cured into highly proton conductive solid membranes. The liquid precu
- Zhou, Zhilian,Dominey, Raymond N.,Rolland, Jason P.,Maynor, Benjamin W.,Pandya, Ashish A.,DeSimone, Joseph M.
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Read Online
- Synthesis, Characterization, and Biological Investigation of Alanine-Based Sulfonamide Derivative: FT-IR, 1H NMR Spectra: MEP, HOMO–LUMO Analysis, and Molecular Docking
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Abstract: A combined experimental and theoretical investigation has been reported on N-(alanine)-p-styrene sulfonamide (abbreviated as ASS). The new title compound have been synthesized for the first time from the reaction of p-styrene sulfonyl chloride a
- Parvaneh Shafieyoon,Mehdipour, Ebrahim,Michalski, Jacek
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Read Online
- Latent reactive groups unveiled through equilibrium dynamics and exemplified in crosslinking during film formation from aqueous polymer colloids
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The concept of using equilibrium dynamics to provide for both protection and unveiling of latent functional groups at appropriate times in aqueous polymer colloid coatings designed for crosslinking only during film formation is introduced; the new functional monomer, 4-hydroxyethylsulfonylstyrene (HESS), readily undergoes emulsion copolymerization with acrylates to form stable latexes, followed by crosslinking by loss of water during film formation. The Royal Society of Chemistry 2005.
- Berrisford, David J.,Lovell, Peter A.,Suliman, Nadia R.,Whiting, Andrew
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Read Online
- Realisation of ORMOSIL ionomers by the crosslinking of propyl methacrylate siloxane and a protected styrenesulfonic acid
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1,2,3,4-Tetrahydro-1-naphthylideneamino styrene-p-sulfonate (NISS) and poly(propyl methacrylate siloxane) (PMS) were free-radically crosslinked, yielding insoluble copolymers in which the siloxane and NISS components appear well intermixed. These material
- Apperley, David C.,Evans, Philip J.,Slade, Robert C. T.,Varcoe, John R.,Young, Kevin E.
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Read Online
- NEW POLYMERS AND THE USE THEREOF FOR DETECTING ION FLUXES
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Disclosed are ion-sensitive polymers and methods for their use for monitoring biological phenomena associated with ion fluxes, as well as organic electrochemical transistors including such polymers.
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- Method of manufacturing a polymerizable functional group having a sulfonimide salts
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[Problem] high-sulfonimide acids without passing through self-polymerization, to cause halogen residual amine salt as a raw material without using a radiosensitive, simple, high yield, high purity industrial scale production method of adsorbing silver hal
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Paragraph 0048-0050
(2021/11/27)
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- Scalable and Recyclable All-Organic Colloidal Cascade Catalysts
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We report on the synthesis of core–shell microparticles (CSMs) with an acid catalyst in the core and a base catalyst in the shell by surfactant-free emulsion polymerization (SFEP). The organocatalytic monomers were separately copolymerized in three synthetic steps allowing the spatial separation of incompatible acid and base catalysts within the CSMs. Importantly, a protected and thermo-decomposable sulfonate monomer was used as acid source to circumvent the neutralization of the base catalyst during shell formation, which was key to obtain stable, catalytically active CSMs. The catalysts showed excellent performance in an established one-pot model cascade reaction in various solvents (including water), which involved an acid-catalyzed deacetalization followed by a base-catalyzed Knoevenagel condensation. The CSMs are easily recycled, modified, and their synthesis is scalable, making them promising candidates for organocatalytic applications.
- Chen, Chen,Gr?schel, André H.,Gramse, Christian,Janoszka, Nicole,Weberskirch, Ralf,Wong, Chin Ken
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supporting information
p. 237 - 241
(2020/10/30)
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- Highly selective electroreductive linear dimerization of electron-deficient vinylarenes
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A direct electroreductive dimerization of electron-deficient vinylarenes for the synthesis of 1,4-diarylbutane has been developed using a simple undivided cell with inexpensive carbon electrodes at room temperature. The control and deuterium-labeling experiments of electroreductive dimerization suggest that the hydrogen source comes from the solvent CH3CN. This protocol provides a mild and efficient route for the construction of C–C bond in moderate to good yields with high regioselectivity and broad substrate scope.
- Ning, Shulin,Zheng, Lianyou,Bai, Ya,Wang, Shutao,Wang, Siyu,Shi, Lingling,Gao, Qiansong,Che, Xin,Zhang, Zhuoqi,Xiang, Jinbao
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supporting information
(2021/11/16)
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- Synthesis method of N-trifluoromethanesulfonyl-P-styrene sulfonyl imide lithium
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The invention discloses a synthesis method of N - trifluoromethylsulfonyl-p-styrene sulfonyl imide lithium, relates to the technical field of battery electrolyte additives, and the synthesis method takes sodium styrene sulfonate and oxalyl chloride under
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Paragraph 0035-0038; 0047-0050; 0057-0060; 0067-0070; ...
(2021/12/08)
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- Physically mixed catalytic system of amino and sulfo-functional porous organic polymers as efficiently synergistic co-catalysts for one-pot cascade reactions
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In this article, acid/base bi-functional polymeric materials were prepared using physically mixed porous poly(divinylbenzene-co-4-vinylbenzenesulfonic acid) (P(DVB-VBS)) with sulfonic acid groups and poly(divinylbenzene-co-4-vinylbenzyl amine) (P(DVB-VBA)) with amino groups, which were synthesized by solvothermal polymerization of crosslinker DVB with either phenyl 4-vinylbenzenesulfonate (PVBS) or 4-vinylbenzyl amine hydrochloride (VBAH) functional monomers together with subsequent hydrolyzation or alkaline treatment. The bi-functional polymeric materials were utilized as a synergistic catalytic system for one-pot cascade reactions including deacetalization-Henry condensation reaction, deacetalization-Knoevenagel condensation reaction and the transformation of 3,4-dihydropyran derivatives to α-ester cyclohexenone compounds. The crosslinked polymeric frameworks effectively isolated sulfonic acid and primary amine groups to ensure their roles as both acid and base catalyst simultaneously in a one-pot system. The hierarchical porosity of a physically mixed acid/base co-catalyst system provided the possibility for the multi-step transformation of more complex substrates.
- Bian, Guomin,Huang, Xianpei,Liu, Fuyao,Qi, Yonglin,Sun, Zunming,Yang, Xinlin,Yang, Xinyue,Zhang, Mengmeng,Zhang, Wangqing
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p. 9546 - 9556
(2020/06/17)
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- HIV-1 Protease Inhibitors Incorporating Stereochemically Defined P2′ Ligands to Optimize Hydrogen Bonding in the Substrate Envelope
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A structure-guided design strategy was used to improve the resistance profile of HIV-1 protease inhibitors by optimizing hydrogen bonding and van der Waals interactions with the protease while staying within the substrate envelope. Stereoisomers of 4-(1-hydroxyethyl)benzene and 4-(1,2-dihydroxyethyl)benzene moieties were explored as P2′ ligands providing pairs of diastereoisomers epimeric at P2′, which exhibited distinct potency profiles depending on the configuration of the hydroxyl group and size of the P1′ group. While compounds with the 4-(1-hydroxyethyl)benzene P2′ moiety maintained excellent antiviral potency against a panel of multidrug-resistant HIV-1 strains, analogues with the polar 4-(1,2-dihydroxyethyl)benzene moiety were less potent, and only the (R)-epimer incorporating a larger 2-ethylbutyl P1′ group showed improved potency. Crystal structures of protease-inhibitor complexes revealed strong hydrogen bonding interactions of both (R)- and (S)-stereoisomers of the hydroxyethyl group with Asp30′. Notably, the (R)-dihydroxyethyl group was involved in a unique pattern of direct hydrogen bonding interactions with the backbone amides of Asp29′ and Asp30′. The SAR data and analysis of crystal structures provide insights for optimizing these promising HIV-1 protease inhibitors.
- Rusere, Linah N.,Lockbaum, Gordon J.,Lee, Sook-Kyung,Henes, Mina,Kosovrasti, Klajdi,Spielvogel, Ean,Nalivaika, Ellen A.,Swanstrom, Ronald,Yilmaz, Nese Kurt,Schiffer, Celia A.,Ali, Akbar
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supporting information
p. 8062 - 8079
(2019/09/09)
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- Synthesis, characterization and biological investigation of glycine-based sulfonamide derivative and its complex: Vibration assignment, HOMO – LUMO analysis, MEP and molecular docking
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A combined experimental and theoretical investigation has been reported on N-(glycine)-para styrene sulfonamide (abbreviated as GSS). The GSS and its complex were synthesized for first time in two steps. The GSS was synthesized from the reaction of para styrene sulfonyl chloride and glycine in the mild condition. The palladium complex was prepared from the reaction of PdCl2, CH3CN and GSS as a ligand. The GSS and its complex was confirmed using FT-IR and 1H-NMR spectra. The data obtained from wave number calculations are used to assign vibrational bands obtained in infrared and Raman spectra recorded. Potential energy distribution was done using GAR2PED program. HOMO-LUMO analysis, and Molecular Electrostatic Potential studies of the GSS and its complex have been investigated using DFT method. The GSS is investigated against Staphylococcus aureus and Escherichia coli. Molecular Docking study of GSS is also reported.
- Shafieyoon, Parvaneh,Mehdipour, Ebrahim,Mary, Y. Sheena
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p. 244 - 252
(2019/01/11)
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- BIS-(4-HALOETHYLBENZENESULFONYL)IMIDE OR ITS SALT, METHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING BIS-(4-STYRENESULFONYL)IMIDE OR ITS SALT USING BIS-(4-HALOETHYLBENZENESULFONYL)IMIDE AS PRECURSOR
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PROBLEM TO BE SOLVED: To provide a method for producing bis-(4-styrenesulfonyl)imide or its salt which is excellent in radical polymerizability, cation exchangeability and high water-solubility and is extremely useful for producing an ion exchange membran
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Paragraph 0090-0095
(2020/01/14)
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- BIS-(4-HALOETHYLBENZENESULFONYL)IMIDE OR ITS SALT, METHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING BIS-(4-STYRENESULFONYL)IMIDE OR ITS SALT USING BIS-(4-HALOETHYLBENZENESULFONYL)IMIDE AS PRECURSOR
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PROBLEM TO BE SOLVED: To provide bis-(4-styrenesulfonyl)imide or its salt which is a crosslinkable monomer having excellent radical polymerizability, cation exchangeability and high water-solubility and is extremely useful for producing a solid electrolyt
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Paragraph 0081; 0084-0085
(2018/05/05)
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- Polystyrene bis[N-(2-pyridyl) sulfonamide] palladium(II): Synthesis, characterization as a catalyst for coupling reactions
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The [N-(2-pyridyl)] para-styrene sulfonamide (PSS) was prepared as a monomer, from the reaction of para-styrene sulfonyl chloride and 2-amino pyridine in the presence of potassium hydroxide solution 0.5?M as a base, and CH3Cl. Polystyrene [N-(2-pyridyl) sulfonamide] (PPSS) was synthesized from the polymerization of [N-(2-pyridyl)] para-styrene sulfonamide (PSS). The Polystyrene bis [N-(2-pyridyl) sulfonamide] palladium (II) as a polymer- supporting palladium complex was also prepared from the reaction of PdCl2 (CH3CN)2 with PPSS in the presence of KOH 0.5?M. Polystyrene bis [N-(2-pyridyl) sulfonamide] palladium (II) is produced as a novel heterogeneous catalyst for coupling reactions for C-C bond formation. This method includes higher yield and has an easier work-up procedure. The structures of the monomer, polymer and its Pd complex were confirmed by using FT-IR and 1H-NMR spectroscopy. Elemental analysis of Pd by inductively coupled plasma (ICP) technique and hot filtration test showed loading of the metal into solution from the catalyst The heterogeneous catalyst was recycled without any loss in its properties.
- Shafieyoon, Parvaneh,Mehdipour, Ebrahim,Tavakol, Hosein
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p. 324 - 328
(2018/01/04)
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- COMPOUND INCLUDING AROMATIC RING, POLYMER INCLUDING THE SAME
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The present disclosure relates to a compound including an aromatic ring and to a polymer including the same. The compound according to one embodiment of the present invention has a styrene-based functional group capable of radical polymerization and a fun
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Paragraph 0110-0113
(2018/06/15)
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- Preparation and characterization of Cu (II) supported on poly(8-hydroxyquinoline-p-styrene sulphonate) and its application as catalyst for the synthesis of hexahydroquinolines
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Cu (II) supported on poly(8-hydroxyquinoline-p-styrenesulfonate) (Cu (II)@PHQSS) was prepared and fully characterized by the different techniques including fourier transform infrared spectroscopy (FT-IR), 1H NMR, 13C NMR, thermal gra
- Khazaei, Ardeshir,Tavasoli, Mahsa,Jamshidi, Vahid,Ghalil, Fatemeh Gohari,Moosavi-Zare, Ahmad Reza
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- SALT AND COLORED CURABLE COMPOSITION
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The present invention relates to a salt and a colored curable composition. The purpose of the present invention is to provide a salt which not only is useful as material for a color filter having excellent resistance against N-methyl pyrrolidone (NMP), bu
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Paragraph 0402-0408
(2018/03/23)
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- SALT AND COLORED CURABLE RESIN COMPOSITION
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The present invention relates to a salt and a colored curable resin composition. The purpose of the present invention is to provide a material which is useful to a color filter having excellent heat resistance or resistance against N-methyl pyrrolidone (N
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Paragraph 0477; 0478
(2018/03/29)
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- Salt and coloring curable resin composition for providing material of color filter with an efficient resistance to heat or to N-methylpyrrolidone (NMP)
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A salt comprises (a) a cation represented by formula (A-I), and (b) a polymer having a structural unit derived from an anionic compound represented by formula (A-II). In the formula (A-I), R to R each independently represents a hydrogen atom, an a
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Paragraph 63
(2018/06/12)
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- Salt and coloring curable compound for providing material of color filter with an effective resistance to N-methylpyrrolidone (NMP)
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A salt which consists of (a) a cation represented by the formula (A-I), and (b) a polymer having structural units originating from an anionic compound represented by the formula (A-II). In the formula (A-I), each of R - R independently represents
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Page/Page column 52; 53; 54
(2018/06/01)
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- Compound
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PROBLEM TO BE SOLVED: To solve the problem in which coating films formed from colored curable resin compositions comprising conventionally known compounds are insufficient in heat resistance and NMP resistance. SOLUTION: A compound comprises a polymer hav
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Paragraph 0215
(2017/02/28)
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- NOVEL CROSS-LINKER FOR THE PREPARATION OF A NEW FAMILY OF SINGLE ION CONDUCTION POLYMERS FOR ELECTROCHEMICAL DEVICES AND SUCH POLYMERS
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A specific cross-linker, an alkaline metal bis(styrenesulfonyl)imide monomer, is used in the synthesis of single ionic conductive copolymers that are non-fluorinated and non-PEO based. Such copolymers meet the security and costs requirements to be used as
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Paragraph 0099-0101
(2016/07/05)
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- NOVEL CROSS-LINKER FOR THE PREPARATION OF A NEW FAMILY OF SINGLE ION CONDUCTION POLYMERS FOR ELECTROCHEMICAL DEVICES AND SUCH POLYMERS
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A specific cross-linker, an alkaline metal bis(styrenesulfonyl)imide monomer, is used in the synthesis of single ionic conductive copolymers that are non-fluorinated and non-PEO based. Such copolymers meet the security and costs requirements to be used as
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Paragraph 0107; 0108; 0109; 0110
(2016/10/31)
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- SALT, RESIN, RESIST COMPOSITION AND METHOD FOR PRODUCING RESIST PATTERN
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A salt represented by the formula (I); wherein Q1 and Q2 each independently represent a fluorine atom or a C1 to C6 perfluoroalkyl group, Lb1 represents a single bond or a divalent C1 to C24 saturated hydrocarbon groupwhere a methylene group may be replaced by an oxygen atom or a carbonyl group and where a hydrogen atom may be replaced by a hydroxyl group or a fluorine atom, and Y represents a hydrogen atom, a fluorine atom, or an optionally substituted C3 to C18 alicyclic hydrocarbon groupwhere a methylene group may be replaced by an oxygen atom, a carbonyl group or a sulfonyl group; and Ar represents a divalent C6 to C20 aromatic hydrocarbon group, and Z+ represents an organic sulfonium cation or an organic iodonium cation.
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Paragraph 0701
(2016/03/14)
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- A pH-Responsive Soluble-Polymer-Based Homogeneous Ruthenium Catalyst for Highly Efficient Asymmetric Transfer Hydrogenation (ATH)
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A pH-responsive polymer has been synthesized successfully by means of copolymerization of dimethyl aminopropyl acrylamide (DMAPA) and N-p-styrenesulfonyl-1,2-diphenylethylenediamine (V-TsDPEN). The pH-responsive polymer coordination ruthenium complex was thus prepared and employed as an efficient catalyst for the asymmetric transfer hydrogenation (ATH) of various ketones. The polymer catalyst exhibited an attractive pH-induced phase-separable behavior in water: it could be dissolved in water when the pH of the solution was lower than 6.5 at the beginning of the reaction, but was precipitated completely from water when the pH of the solution was above 8.5 after reaction. Additionally, the catalysts were highly efficient for the ATH of a wide range of substrates that bore different functional groups and could be recycled easily from the aqueous solution by means of self-separation. They could be recycled eight times without significant changes in catalytic activity and enantioselectivity.
- Xie, Yinzheng,Wang, Mengpan,Wu, Xiaohui,Chen, Chen,Ma, Wenbo,Dong, Qifeng,Yuan, Mingming,Hou, Zhenshan
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p. 541 - 549
(2016/07/06)
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- COLORING CURABLE RESIN COMPOSITION, CURED FILM, COLOR FILTER, METHOD FOR MANUFACTURING COLOR FILTER, SOLID-STATE IMAGING DEVICE, IMAGE DISPLAY DEVICE, COMPOUND, AND CATION
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The present invention provides a colored curable resin composition that exhibits good heat resistance and durability in a sputtering process, a cured film, a color filter, a method for manufacturing a color filter, a solid-state image device, an image dis
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Paragraph 0691; 0692
(2017/01/19)
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- Design, synthesis and thermal behaviour of a series of well-defined clickable and triggerable sulfonate polymers
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In the printing industry, the exploitation of triggerable materials that can have their surface properties altered on application of a post-deposition external stimulus has been crucial for the production of robust layers and patterns. To this end, herein
- Kolomanska, Joanna,Johnston, Priscilla,Gregori, Alberto,Fraga Domnguez, Isabel,Egelhaaf, Hans-Joachim,Perrier, Sbastien,Rivaton, Agns,Dagron-Lartigau, Christine,Topham, Paul D.
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p. 66554 - 66562
(2015/08/24)
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- Acid-amplifying polymers: Synthesis, characterization, and application to environmentally stable chemical amplification positive (ESCAP) resists
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Acid amplifiers that are decomposed autocatalytically by acid species photogenerated from photoacid generators were synthesized and characterized. Such acid proliferation reactions by acid amplifiers were integrated into chemical amplification resists to
- Arimitsu,Yonekura,Furutani
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p. 80311 - 80317
(2015/10/06)
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- A well-defined polyelectrolyte and its copolymers by reversible addition fragmentation chain transfer (RAFT) polymerization: Synthesis and applications
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Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerization of 4-styrenesulfonyl(trifluoromethylsulfonyl)imide potassium salt (SKTFSI) in N,N-dimethylformamide (DMF) solution was carried out using 2-(dodecylsulfanylthiocarbonylsulfanyl)-2-methy
- Mumtaz, Muhammad,Aissou, Karim,Katsigiannopoulos, Dimitrios,Brochon, Cyril,Cloutet, Eric,Hadziioannou, Georges
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p. 98559 - 98565
(2015/12/04)
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- Recoverable silica-gel supported binam-prolinamides as organocatalysts for the enantioselective solvent-free intra- and intermolecular aldol reaction
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Silica-gel supported binam-derived prolinamides are efficient organocatalysts for the direct intramolecular and intermolecular aldol reaction under solvent-free conditions using conventional magnetic stirring. These organocatalysts in combination with benzoic acid showed similar results to those obtained under similar homogeneous reaction conditions using an organocatalyst of related structure. For the intermolecular process, the aldol products were obtained at room temperature and using only 2 equiv of the ketone with high yields, regio-, diastereo- and enantioselectivities. Under these reaction conditions, also the cross aldol reaction between aldehydes is possible. The recovered catalyst can be reused up to nine times providing similar results. More interestingly, these heterogeneous organocatalysts can be used in the intramolecular aldol reaction allowing the synthesis of the Wieland-Miescher and ketone analogues with up to 92% ee, with its reused being possible up to five times without detrimental on the obtained results.
- Ba?ón-Caballero, Abraham,Guillena, Gabriela,Nájera, Carmen,Faggi, Enrico,Sebastián, Rosa María,Vallribera, Adelina
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p. 1307 - 1315
(2013/02/23)
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- Superhydrophobic, chiral, and mesoporous TsDPEN copolymer coordinated to ruthenium species as an efficient catalyst for asymmetric transfer hydrogenation
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Homogeneous chiral catalysts usually show higher catalytic activities than corresponding heterogeneous chiral catalysts, because of their easy interaction between catalytically active sites with reactant molecules. We demonstrate here superhydrophobic, chiral, and mesoporous catalysts (TsDPEN-Ru) synthesized from copolymerization of N-p-styrenesulfonyl-1,2-diphenylethylenediamine (V-TsDPEN) with divinylbenzene and loading of Ru species exhibiting much higher activities in asymmetric transfer hydrogenation (ATH) of ketones in aqueous solution than corresponding homogeneous chiral catalyst. This phenomenon is strongly related to the unique features of high enrichment for the reactants in superhydrophobic TsDPEN-Ru catalysts due to their good wettability, as well as easy transfer of product from the catalyst into water phase. These features open a door for design and developing a wide variety of chiral catalysts for asymmetric catalysis.
- Sun, Qi,Jin, Yinying,Zhu, Longfeng,Wang, Liang,Meng, Xiangju,Xiao, Feng-Shou
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p. 342 - 350
(2013/09/23)
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- Cross-linked-polymer-supported N-{2'-[(Arylsulfonyl)amino][1,1'- binaphthalen]-2-yl}prolinamide as organocatalyst for the direct aldol intermolecular reaction under solvent-free conditions
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A bottom-up strategy was used for the synthesis of cross-linked copolymers containing the organocatalyst N-{(1R)-2'-{[(4-ethylphenyl)sulfonyl]amino}[1,1'- binaphthalen]-2-yl}-D-prolinamide derived from 2 (Scheme 1). The polymer-bound catalyst 5b containin
- Banon-Caballero, Abraham,Guillena, Gabriela,Najera, Carmen
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p. 1831 - 1841,11
(2012/12/12)
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- Cross-linked-polymer-supported N-{2'-[(Arylsulfonyl)amino][1,1'- binaphthalen]-2-yl}prolinamide as organocatalyst for the direct aldol intermolecular reaction under solvent-free conditions
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A bottom-up strategy was used for the synthesis of cross-linked copolymers containing the organocatalyst N-{(1R)-2'-{[(4-ethylphenyl)sulfonyl]amino}[1,1'- binaphthalen]-2-yl}-D-prolinamide derived from 2 (Scheme 1). The polymer-bound catalyst 5b containin
- Ba??n-Caballero, Abraham,Guillena, Gabriela,Nájera, Carmen
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p. 1831 - 1841
(2013/01/15)
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- Oxidation reactions using polymer-supported 2-benzenesulfonyl-3-(4- nitrophenyl)oxaziridine
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A thermally stable polymer-supported oxidant has been developed. Polymer-supported 2-benzenesulfonyl-3-(4-nitrophenyl)oxaziridine was applied to microwave-assisted reactions that occurred at high temperatures and was shown to oxidize alkenes, silyl enol ethers, and pyridines to the corresponding epoxides and pyridine N-oxides in excellent to good yields and with much shorter reaction times. It also enabled tetrahydrobenzimidazoles to be oxidatively rearranged to spiro fused 5-imidazolones in a more efficient manner. Recycling of the polymer-supported oxidant is also possible with minimal loss of activity after several reoxidations.
- Susanto, Woen,Lam, Yulin
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experimental part
p. 8353 - 8359
(2011/11/12)
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- Polymer nanoparticles via intramolecular crosslinking of sulfonyl azide functionalized polymers
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A new approach to prepare polymeric nanoparticles via intramolecular collapse of single chain of sulfonyl azide functionalized polymers is proposed. Upon heating, the sulfonyl azide functionalized linear copolymers lose nitrogen and form nitrene. This nit
- Jiang, Xiaoyu,Pu, Hongting,Wang, Peng
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experimental part
p. 3597 - 3602
(2012/05/20)
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- Resin cross-linking
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A method of effecting cross-linking of a resin comprises generating vinyl sulfonyl moieties in situ with the resin, said sulfonyl moieties then undergoing a reaction which effects cross-linking of the resin. The vinyl sulfonyl moieties may be generated as a result of a loss of a liquid carrier for the resin to be cross-linked. The cross-linking reaction may result from reaction of the vinyl sulfonyl moieties with nucleophilic groups in the resin composition. The resin may be a co-polymer of a compound of formula (IV) with other olefinically unsaturated monomers.
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Page/Page column 4
(2010/02/17)
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- Solvent-free direct enantioselective aldol reaction using polystyrene-supported N-sulfonyl-(Ra)-binam-d-prolinamide as a catalyst
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The immobilization of N-sulfonyl-(Ra)-binam-d-prolinamide using polystyrene as a support allows the recovery of an efficient catalytic system for the enantioselective direct aldol reaction between different ketones and aldehydes under solvent-f
- Banon-Caballero, Abraham,Guillena, Gabriela,Najera, Carmen
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experimental part
p. 1599 - 1606
(2010/12/25)
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- Asymmetric transfer hydrogenation of aromatic ketones in water using a polymer-supported chiral catalyst containing a hydrophilic pendant group
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Hydrophilic polymers having pendant groups of carboxylates or sulfonates have been used as a polymer support for chiral 1,2-diamine monosulfonamides. The polymeric chiral complex prepared from the polymer-supported chiral ligand with ruthenium dichloride·p-cymene was used in the asymmetric transfer hydrogenation of prochiral ketones in water. The balance between hydrophilicity and hydrophobicity of the polymer support influenced both the reactivity and the enantioselectivity of the reaction in water. The chiral polymeric complex having a quaternary ammonium salt structure as the pendant group worked well in water. In most cases the polymer-supported catalyst having a quaternary ammonium sulfonate pendant group showed superior enantioselectivity compared to the corresponding non-supported model catalyst in the solution system. The polymeric catalysts can be reused without loss of catalytic activity.
- Arakawa, Yukihiro,Chiba, Atsuko,Haraguchi, Naoki,Itsuno, Shinichi
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supporting information; experimental part
p. 2295 - 2304
(2009/10/08)
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- The first example of molecularly imprinted nanogels with aldolase type I activity
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The molecular-imprinting approach was used to obtain a nanogel preparation capable of catalysing the cross-aldol reaction between 4-nitrobenzaldehyde and acetone. A polymerisable proline derivative was used as the functional monomer to mimic the enamine-b
- Carboni, Davide,Flavin, Kevin,Servant, Ania,Gouverneur, Veronique,Resmini, Marina
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supporting information; experimental part
p. 7059 - 7065
(2009/08/12)
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- Selective formation of a coordinatively unsaturated metal complex at a surface: A SiO2-immobilized, three-coordinate ruthenium catalyst for alkene epoxidation
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(Chemical Equation Presented) Unsaturated but air-stable: A three-coordinate Ru complex, 2, highly active for alkene epoxidation and recyclable in air, was prepared on SiO2 by exploiting the exothermic reaction between O2 and isobutyraldehyde (IBA) to eliminate a p-cymene ligand from a coordinatively saturated precursor 1 (Ru red, Cl dark blue, N green, S yellow, O blue, C gray, H white). In contrast, direct activation with O2 alone was calculated to be endothermic.
- Tada, Mizuki,Coquet, Rudy,Yoshida, Jun,Kinoshita, Mutsuo,Iwasawa, Yasuhiro
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p. 7220 - 7223
(2008/09/17)
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- Polymer supported trans-1-phenylsulfonylamino-2-isoborneolsulfonylaminocyclohexane ligand for the titanium catalyzed organozinc addition to ketones
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The catalytic enantioselective addition of different organozinc reagents, such as diethylzinc, or in situ generated phenylzinc derivatives to simple ketones was accomplished using titanium tetraisopropoxide and supported chiral ligands derived from trans-
- Forrat, Vicente J.,Ramon, Diego J.,Yus, Miguel
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p. 2054 - 2058
(2007/10/03)
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- Asymmetric Mukaiyama aldol reaction of silyl enol ethers with aldehydes using a polymer-supported chiral Lewis acid catalyst
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Chiral N-sulfonylated α-amino acid monomer (5) derived from (S)-tryptophan was copolymerized with styrene and divinylbenzene under radical polymerization conditions to give a polymer-supported N-sulfonyl-(S)-tryptophan (6). Treatment of the polymer-supported chiral ligand with 3,5- bis(trifluoromethyl)phenyl boron dichloride afforded a polymeric Lewis acid catalyst (16) effective for asymmetric Mukaiyama aldol reaction of silyl enol ethers and aldehydes. Various aldehydes were allowed to react with silyl enol ethers in the presence of the polymeric chiral Lewis acid to give the corresponding aldol adducts in high yield with high levels of enantioselectivity.
- Itsuno, Shinichi,Arima, Shinnosuke,Haraguchi, Naoki
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p. 12074 - 12080
(2007/10/03)
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- High-load, soluble oligomeric benzenesulfonyl azide: Application to facile diazo-transfer reactions
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The development of a high-load, soluble oligomeric sulfonyl azide using ROM polymerization is reported. The utility in diazo transfer reactions with active methylene compounds is demonstrated using an efficient protocol, with most reactions showing completion in 30 min. The sulfonamide byproduct, being insoluble in the reaction solvent, can be completely removed by simple filtration through a silica gel SPE cartridge.
- Harned, Andrew M.,Sherrill, W. Matthew,Flynn, Daniel L.,Hanson, Paul R.
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p. 12093 - 12099
(2007/10/03)
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- Facile regeneration of carbonyl compounds from oximes using poly[4-vinyl-N,N-dichlorobenzenesulfonamide]
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Oximes of aldehydes and ketones are oxidized to the corresponding carbonyl compounds in good yields under mild conditions by poly[4-vinyl-N,N-dichlorobenzenesulfonamide].
- Khazaei, Ardeshir,Vaghei, Ramin Ghorbani
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p. 3073 - 3074
(2007/10/03)
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- Palladium(0) complexes of a 15-membered macrocyclic triolefin as a recoverable catalyst - Monomer- and polystyrene-anchored versions
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Preparation of the 15-membered cycle (E,E,E)-1,6,11-tris[(2,4,6- triisopropylphenyl)sulfonyl]-1,6,11-triazacyclopentadeca-3,8,13-triene (8) is reported. This cyclic triolefin forms a stable Pd°complex 9 which catalyzes several cross-coupling reactions and
- Cortés, Jordi,Moreno-Ma?as, Marcial,Pleixats, Roser
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p. 239 - 243
(2007/10/03)
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- Conversions of Carbonyl Compounds via Their Polymeric Sulfonylhydrazones into Alkenes, Alkanes, and Nitriles
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Resins consisting of cross-linked poly(styrene-divinylbenzene) matrices functionalized with hydrazinosulfonyl groups react with aldehydes and ketones to form the sulfonylhydrazone derivatives.The extent of the reaction is sensitive to the type of resin and the bulk of the carbonyl compound.When heated strongly under alkaline conditions, the sulfonylhydrazones release the corresponding alkenes; upon the NaBH4 or LiAlH4 treatment, they also release the corresponding alkanes; and, upon refluxing in methanol with potassium cyanide, they release nitriles containing one additional carbon atom.
- Kamogawa, Hiroyoshi,Kanzawa, Asami,Kadoya, Masahiro,Naito, Takeshi,Nanasawa, Masato
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p. 762 - 765
(2007/10/02)
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