- Reaction of 1-amino-3-propoxy-2-propanol with aldehydes
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The reaction of 1-amino-3-propoxy-2-propanol was examined as a route to the corresponding 1,3-oxazolidines.
- Badalova,Mamedova,Alieva,Magerramov,Allakhverdiev
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Read Online
- Ambient Hydrogenation and Deuteration of Alkenes Using a Nanostructured Ni-Core–Shell Catalyst
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A general protocol for the selective hydrogenation and deuteration of a variety of alkenes is presented. Key to success for these reactions is the use of a specific nickel-graphitic shell-based core–shell-structured catalyst, which is conveniently prepared by impregnation and subsequent calcination of nickel nitrate on carbon at 450 °C under argon. Applying this nanostructured catalyst, both terminal and internal alkenes, which are of industrial and commercial importance, were selectively hydrogenated and deuterated at ambient conditions (room temperature, using 1 bar hydrogen or 1 bar deuterium), giving access to the corresponding alkanes and deuterium-labeled alkanes in good to excellent yields. The synthetic utility and practicability of this Ni-based hydrogenation protocol is demonstrated by gram-scale reactions as well as efficient catalyst recycling experiments.
- Beller, Matthias,Feng, Lu,Gao, Jie,Jackstell, Ralf,Jagadeesh, Rajenahally V.,Liu, Yuefeng,Ma, Rui
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supporting information
p. 18591 - 18598
(2021/06/28)
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- PERFUMES IN THE FORM OF AQUEOUS MICROEMULSIONS
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An oil-in-water microemulsion including, in weight percentages: between 70% and 94% of water; between 1% and 15% of at least one perfumed hydrophobic substance; between 4% and 20% of at least one preferably volatile solvo-surfactant, which is a monoalkylated glycerol derivative of formula (I); and between 0.1% and 15% of at least one anionic surfactant and at least one alkyl glucoside as a hydrotropic agent. The microemulsion can therefore be used to produce a fine fragrance composition or a cosmetic or personal hygiene composition.
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Paragraph 0101-0103
(2020/07/04)
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- PERFUMES IN THE FORM OF AQUEOUS MICROEMULSIONS
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Disclosed is a microemulsion of oil-in-water type including, preferably consisting of, by weight relative to the total weight of microemulsion: ? 70% to 94% of water, ? 1% to 15% of at least one hydrophobic fragrancing substance, ? 4% to 20% of at least one preferably volatile solvo-surfactant, and ? 0.1% to 15%, preferably 1% to 13%, of at least one hydrotropic agent or at least one surfactant selected from anionic surfactants, cationic surfactants, amphoteric surfactants and non-ionic surfactants. The solvo-surfactant is selected from monoalkylated glycerol derivatives of following formula (I): wherein the “alkyl” group is a linear or branched alkyl group including from 1 to 8 carbon atoms, and R and R′ are each independently H or a linear or branched alkyl group including from 1 to 5 carbon atoms, with the proviso that R is different from R′, and mixtures thereof.
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Paragraph 0136-0140
(2020/11/30)
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- The synthesis and curing kinetics study of a new fluorinated polyurethane with fluorinated side chains attached to soft blocks
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Fluorinated polyurethane (FPU) with fluorine in the side chain was obtained using fluorinated polyether glycol (FPO) with fluorinated side chains and 4,4′-diphenyl methane diisocyanate (MDI). The direct visual inspection of microstructures by SEM revealed that the separation degree of soft and hard segments decreased with the introduction of fluorinated groups into polyurethane soft segments, leading to a decrease in the crystallinity of FPU. The glass transition temperatures (Tg) measured by DMA indicated that the optimal working temperature window of FPU separating soft and hard glass transitions became narrow. And the mechanical properties and surface properties of the FPU were also measured. Curing kinetics of FPU was studied using a rotational rheometer, and the activation energy of FPU was obtained. The relationship between the curing temperature and the mobility of fluorinated groups was characterized by XPS. The result showed that F content in the FPU surface decreased with increasing curing temperature.
- Li, Lingling,Wang, Xia,Li, Zan,Bi, Wei,Li, Ying,Qi, Yuanchun,Dong, Qingzhi
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p. 596 - 605
(2016/01/12)
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- OXAZOLOBENZIMIDAZOLE DERIVATIVES
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The present invention is directed to oxazolobenzimidazole derivatives which are potentiators of metabotropic glutamate receptors, particularly the mGluR2 receptor, and which are useful in the treatment or prevention of neurological and psychiatric disorders associated with glutamate dysfunction and diseases in which metabotropic glutamate receptors are involved. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which metabotropic glutamate receptors are involved.
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Page/Page column 26
(2010/04/27)
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- Crystalline MWW-type titanosilicate catalyst for producing oxidized compound, production process for the catalyst, and process for producing oxidized compound by using the catalyst
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A crystalline titanosilicate catalyst which is usable as a catalyst in the oxidation reaction of a compound having a carbon-carbon double bond and at least one other functional group, a process for producing the catalyst, and a process for producing an oxidized compound by an oxidation reaction using the catalyst. It has been found that a crystalline titanosilicate having a structural code of MWW effectively functions as a catalyst in an oxidation reaction of a compound having a carbon-carbon double bond and at least one other functional group, or a compound having a carbon-carbon double bond a functional group and having a total carbon number of not smaller than 2 and not larger than 5, wherein the carbon-carbon double bond of the compound is oxidized by using a peroxide as an oxidizing agent, thereby to highly selectively provide an intended oxidized compound.
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- Crystalline mww-type titanosilicate catalyst for producing oxidized compound, production process for the catalyst, and process for producing oxidized compound by using the catalyst
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A crystalline titanosilicate catalyst which is usable as a catalyst in the oxidation reaction of a compound having a carbon-carbon double bond and at least one other functional group, a process for producing the catalyst, and a process for producing an oxidized compound by an oxidation reaction using the catalyst. It has been found that a crystalline titanosilicate having a structural code of MWW effectively functions as a catalyst in an oxidation reaction of a compound having a carbon-carbon double bond and at least one other functional group wherein the carbon-carbon double bond of the compound is oxidized by using a peroxide as an oxidizing agent, thereby to highly selectively provide an intended oxidized compound.
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- Synthesis, first structures, and catalytic activity of the monomeric rhodium(I)-siloxide phosphine complexes
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Four new square-plane rhodium siloxide complexes of the general formula [Rh(cod)(PR3′)(OSiR3)] (where R = Me, i-Pr, O-t-Bu, R′ = Cy, Ph) were synthesized and the structures of three of them were resolved by the X-ray method. [Rh(cod)(PCy3)(OSiMe3)] (1) appeared to be a very efficient catalyst for hydrosilylation of allyl glycidyl ether to yield, selectively, 3-glycidoxypropyltriethoxysilane, a commercially important silane coupling agent. Catalytic measurements and stoichiometric experiments of 1 with triethoxysilane suggest a mechanism where an unsaturated Rh-H species is responsible for the catalysis.
- Marciniec, Bogdan,Blazejewska-Chadyniak, Paulina,Kubicki, Maciej
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p. 1292 - 1298
(2007/10/03)
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- An immobilized homogeneous catalyst for efficient and selective hydrogenation of functionalized aldehydes, alkenes, and alkynes
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An immobilized cationic rhodium(I) catalyst bearing the diphosphine 1,1′-bis(diisopropylphosphino)-ferrocene (DiPFc, 1) allows efficient and chemoselective hydrogenation of a range of functionalized aldehydes, as well as alkenes and alkynes, under mild conditions. This heterogenized catalyst system is convenient to prepare, is stable to air and moisture over extended periods, and is readily recycled.
- Burk,Gerlach,Semmeril
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p. 8933 - 8939
(2007/10/03)
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- Highly chemoselective hydrogenation with retention of the epoxide function using a heterogeneous Pd/C - Ethylenediamine catalyst and THF
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In general, palladium-carbon (Pd/C) catalyzed hydrogenation of epoxides affords the corresponding primary and secondary alcohols as a mixture. It has been found that the catalytic activity of a Pd/C - ethylenediamine complex catalyst [Pd/C(en)] in the hydrogenolysis of epoxide functions is drastically reduced. Herein we describe a mild and chemoselective method for the hydrogenation of olefin, nitro, and azide functions with retention of the epoxide function. The chemoselectivity was accomplished by using a combination of 5% Pd/C(en) and THF as solvent. A significant drop in the chemoselectivity of the hydrogenation is observed with 5% Pd/C(en) in MeOH. These results reinforce the utility of epoxides as important precursors of alcohols in synthetic chemistry.
- Sajiki, Hironao,Hattori, Kazuyuki,Hirota, Kosaku
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p. 2200 - 2204
(2007/10/03)
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- An efficient and stereoselective synthesis of (2R,2′S)-1-O-(2′-hydroxyhexadecyl)glycerol and its oxo analogs: Potential antitumour compounds from Shark Liver Oil
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Reproducible, high-yielding, cost efficient, regio- and stereoselective synthesis of the title compound 3 isolated from Shark Liver Oil has been described. The compound 3 is prepared in an overall yield of 41% from chiral synthon 4 by the sequential reaction of 4 with C-13 Wittig salt; hydrogenation; epoxidation and regioselective opening. The oxo analogs 18 and 19 are prepared from four different achiral synthons by the sequential regioselective opening of the corresponding epoxide with different alcohols, methylation and deprotection strategies. Copyright
- Baskaran, Subramanian,Baig, Mirza Hamed A.,Banerjee, Sharmila,Baskaran, Chitra,Bhanu, Kanchinadham,Deshpande, Sonali P.,Trivedi, Girish K.
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p. 6437 - 6452
(2007/10/03)
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- Investigations on local anaesthetics, IC: Syntheses and local anaesthetic properties of alkoxyphenylcarbamates
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Within the framework of studying the influence of alterations of the connecting chain in the group of local anaesthetics a series of 24 compounds of 1-propoxymethyl-2-(1-pyrrolidinyl), 2-(1-piperidino)-, and 2-(1-perhydroazepinyl)-ethyl esters of o- and m-alkoxyphenylcarbamic acid were prepared. Studied compounds show a high index of relative local anaesthetic activityas compared to the standards cocaine and procaine, at a relatively low acute toxicity.
- Buciova,Csollei,Racanska,Svec
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p. 393 - 396
(2007/10/02)
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