- Synthesis of lithium ω-(m- and p-lithiophenoxy)alkoxides modified with magnesium 2-ethoxyethoxide. Crystal structures of bis[4-(2-hydroxyethoxy)phenyl]mercury and bis[4-(3-hydroxypropoxy)phenyl]mercury
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m- and p-Chlorinated ω-phenoxyalcohols 1, were transformed into the corresponding lithium ω-(m- and p-lithiophenoxy)alkoxides 4, respectively, by successive deprotonation with n-butyllithium and subsequent chlorine-lithium exchange by lithium naphthalene radical anion in THF-methylcyclohexane. Lithium 2-(4-lithiophenoxy)ethoxide (4a′) was also prepared by bromine-lithium exchange of 2-(4-bromophenoxy)ethanol (2a′) with two equivalents of n-butyllithium. The organolithiums were modified with magnesium 2-ethoxyethoxide in order to avoid ortho-metallation of the above-mentioned substituted arenes. Subsequent reaction of these intermediates with the electrophiles carbon dioxide, benzophenone, benzonitrile and 0.5 equivalents of mercuric chloride yielded the expected m- and p-substituted (ω-hydroxyalkoxy)benzenes in yields ranging from 50 to 75%. The crystal structures of the organomercurials 8a′ and 8b′ have been determined and revealed the Hg atom to occupy a crystallographic center of symmetry in a linear C-Hg-C arrangement.
- Salteris, Constantinos S.,Kostas, Ioannis D.,Micha-Screttas, Maria,Steele, Barry R.,Heropoulos, George A.,Screttas, Constantinos G.,Terzis, Aris
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- Mechanically Robust, Self-Healable, and Highly Stretchable “Living” Crosslinked Polyurethane Based on a Reversible C?C Bond
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Stimuli-responsive polymers built by reversible covalent bonds used to possess unbalanced mechanical properties. Here, a crosslinked polyurethane containing aromatic pinacol as a novel reversible C?C bond provider is synthesized, whose tensile strength an
- Zhang, Ze Ping,Rong, Min Zhi,Zhang, Ming Qiu
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- METHOD FOR PREPARING HYDROXYBENZOPHENONE POLYGLYCOL ETHER (METH)ACRYLATE
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A method for preparing hydroxybenzophenone polyglycol ether (meth)acrylate comprising the steps of (i) reaction of hydroxybenzophenone with ethylene carbonate to give hydroxybenzophenone monoglycol ether,(ii) ethoxylation of hydroxybenzophenone monoglycol
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Paragraph 0061
(2020/08/30)
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- A novel biocompatible zwitterionic polyurethane with AIE effect for cell imaging in living cells
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In this work, a novel and stable zwitterionic polymer (TPE-CB PUs) was prepared to realize a cellular imaging system. TPE was conjugated into the backbone of zwitterionic polyurethane, which could be well dispersed in aqueous solution and emitted strong b
- Xu, Junhuai,Yan, Rui,Wang, Haibo,Du, Zongliang,Gu, Jun,Cheng, Xu,Xiong, Junjie
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p. 6798 - 6804
(2018/02/23)
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- NITRILEOXIDE COMPOUND
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The present invention provides a compound of the formula (I): wherein, R1 is a hydrogen atom or a hydrocarbon group; R2 is —R4—R5; R3 is —R4—R5 or —R4—R6; R
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Paragraph 0670; 0671; 0672
(2018/03/25)
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- Polymorphic forms of the formulations (by machine translation)
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The present invention provides formulations, the chemical name (Z)- 2 - [4 - (4 - chloro - 1, 2 - diphenyl - d - 1 - enyl) phenoxy] ethanol polymorphic forms, it has excellent stability, and can be a reproduction of the crystal structure. In addition, the present invention also provides formulations polymorph forms of preparation method. (by machine translation)
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Paragraph 0038; 0039; 0040;
(2017/04/07)
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- Photoreactive oligoethylene glycol polymers - Versatile compounds for surface modification by thin hydrogel films
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Solid surfaces are modified using photo-crosslinkable copolymers based on oligo(ethylene glycol) methacrylate (OEGMA) bearing 2-(4-benzoylphenoxy)ethyl methacrylate (BPEM) as a photosensitive crosslinking unit. Thin films of about 100 nm are formed by spi
- Buller, Jens,Laschewsky, Andre,Wischerhoff, Erik
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p. 929 - 937
(2013/03/13)
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- NEW PROCESSES FOR PRODUCING BENZOPHENONE DERIVATIVES
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There is provided a process for the preparation of a compound of formula (I): wherein X, R1, R2a, R2b, R2c, R2d, R2e, R3a, R3b, R3c, R3d and R3e are as described in the description. Such compounds may, for example, be useful medicament (or intermediates for medicaments).
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Page/Page column 23
(2011/08/08)
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- Photochromic polymer conjugates: The importance of macromolecular architecture in controlling switching speed within a polymer matrix
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Naphthopyran-poly(n-butyl acrylate) conjugates with different geometries were assembled using ATRP. First, within a rigid lens matrix, an investigation of the photochromic behavior of various poly(n-butyl acrylate), p(n-BA), homopolymers showed that midplacement of a single dye moiety, made possible using a Y-branching difunctional photochromic initiator, gave superior fade kinetics per chain length of conjugated polymer compared to end-functionalized homopolymers. Furthermore, having the dye pendant from the chain opposed to directly within the chain was also found to be advantageous. Fading kinetics became faster when chain length was increased, except in the case of linear random copolymers made by copolymerization of n-butyl acrylate with a naphthopyran acrylate. A gradient copolymer made with a nonphotochromic difunctional initiator and a naphthopyran methacrylate displayed superior kinetics. Films consisting of ABA triblock copolymers, incorporating the photochromic in the middle of a soft p(n-BA) section, gave slower switching speeds compared to lens samples, with responses that were highly tunable and dependent on the amount of soft section inhabited by the photochromic moiety.
- Ercole, Francesca,Malic, Nino,Harrisson, Simon,Davis, Thomas P.,Evans, Richard A.
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experimental part
p. 249 - 261
(2011/10/02)
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- AZIRIDINE-FUNCTIONAL PHOTOACTIVE CROSSLINKING COMPOUNDS
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A photoactive compound that is the Michael addition reaction product of an aziridine compound and a photoinitiator-functional (meth)acrylate is described. The compound can be used to crosslink (meth)acrylic polymers via a hydrogen abstracting or an alpha-
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Page/Page column 23
(2010/06/20)
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- Cycloalkylidene Compounds as Selective Estrogen Receptor Modulators
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The present invention relates to compounds of formula (I) with a variety of therapeutic uses, more particularly the substituted cyclic alkylidene compounds are useful for selective estrogen receptor modulation.
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Page/Page column 19
(2008/12/06)
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- Copolymerizable phoinitiators for uv-crosslinkable adhesives
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The invention relates to radically copolymerizable acetophenone or benzophenone derivatives, which may be obtained by reacting a) acrylic or methacrylic compounds, which contain at least one isocyanate-reactive group [compounds a)], with b) compounds, whi
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- Design, synthesis, and biological evaluation of new growth inhibitors of Trypanosoma cruzi (epimastigotes)
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As a continuation of our project aimed at the search for new chemotherapeutic agents against Chagas' disease, several drugs structurally related to the insect growth regulator Fenoxycarb and the naturally occurring juvenfie hormone of insects were designed, synthesized, and evaluated as antiproliferative agents against the parasite responsible of this disease. Isoprenoid derivatives (compounds 33, 34, 36, and 37) were potent growth inhibitors of Trypanosoma cruzi epimastigotes. In addition, taking into account the high activity observed for compound 30 and the inhibitory action of related compounds, the allyl ether moiety bonded at the polar extreme of these inhibitors proved to be a promising group for the design of new drugs.
- Schvartzapel, Andrea J.,Zhong, Li,Docampo, Roberto,Rodriguez, Juan B.,Gros, Eduardo G.
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p. 2314 - 2322
(2007/10/03)
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- Photoinitiators for photopolymerization of unsaturated systems
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Compounds of the general formula I STR1 wherein Z is CR1 R2 (OR3) or phenyl, R1 being H, C1-6 -alkyl or phenyl, R2 being H, C1-6 -alkyl or C1-6 -alkoxy and R3 being H, C1-6 -alkyl or C1-6 -alkanoyl and Z' is Y--[(CH2)m --X]n --, X being CH2 or 0, Y being OH; COOH or SO3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C1-20 -alkyl or C1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, and n and m each being the numbers 1-4, are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.
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- Carbamic acid esters
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Carbamic acid esters of the formula STR1 wherein R1, R2, R3, R4, R5, R6, R7, X, and Y are as defined hereinafter, process for their preparation, as well as pesticidal compositions containing these compounds as the active ingredient and methods for using the pesticidal compositions for the control of pests are described.
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- SYNTHESIS OF ACYL 1-ACETOXY-2-PHENOXYETHANES AND THE CORRESPONDING HYDROXY DERIVATIVES
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Acyl 1-acetoxy-2-phenoxyethanes Ia-Id were prepared by aluminium chloride or polyphosphoric acid-catalyzed Friedel-Crafts acylation.Subsequent hydrolysis gave the corresponding alcohols IIa-IId.The formation of ortho-isomers during acylation was not observed.
- Lukac, Ivan,Zvara, Ivan,Kulickova, Magdalena,Hrdlovic, Pavol
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p. 1826 - 1830
(2007/10/02)
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