Tandem conjugate addition of silylcuprate and benzenesulfenyl chloride to unsaturated esters: stereoselective preparation of anti-3-dimethylphenylsilyl-2-phenylthio aldehydes
作者:Mar�a-Jes�s Villa、Stuart Warren
DOI:10.1039/p19940001569
日期:——
Conjugate addition of dimethylphenylsilylcuprate is successful even to a 2,3-disubstituted acrylate ester and when followed by α-sulfenylation of the trapped silyl enol ether intermediate, reduction and re-oxidation gives, for example, (2SR, 3RS)-(anti)-2, 5-dimethyl-3-dimethylphenylsilyl-2-phenylthiohexanal as a single diastereoisomer.
A convenient and facile stereoselectivesynthesis of (E)- and (Z)-trisubstituted alkenes has been achieved by treatment of unactivated Baylis–Hillmanadducts with NaBH4 in the presence of CuCl2·2H2O at room temperature for 15 min.
Coating compositions containing substituted and unsubstituted exomethylene lactone or lactam monomers
申请人:E.I. du Pont de Nemours and Company
公开号:EP1544221A2
公开(公告)日:2005-06-22
This invention is directed to a coating composition used for original equipment manufacturing or refinishing uses in the automotive industry, which coating composition utilizes an acrylic polymer which contains substituted or unsubstituted exomethylene lactones or lactams as a comonomer.
Pigment dispersion liquid, decorative material, transfer material for forming decorative material, substrate with decorative material, touch panel, information display device, and graft type silicone polymer
申请人:FUJIFILM Corporation
公开号:US10184060B2
公开(公告)日:2019-01-22
A pigment dispersion liquid includes a pigment dispersant; and a pigment, in which the pigment dispersant is a graft type silicone polymer denoted by General Formula 1. In General Formula 1, R1 to R10, R15 and R16 represent a hydrogen atom, a hydroxy group, an aryl group, or an alkyl group having 1 to 3 carbon atoms; R11 and R12 represent an arylene group or an alkylene group having 1 to 3 carbon atoms; Y and Z represent a single bond or a divalent organic linking group; A represents a group having a pigment adsorption portion; B represents a group having a structure denoted by General Formula 2; l and n represent an integer of greater than or equal to 1; m represents an integer of greater than or equal to 0; and k represents an integer of greater than or equal to 1.
颜料分散液包括颜料分散剂和颜料,其中颜料分散剂是一种接枝型有机硅聚合物,用通式 1 表示。通式 1 中,R1 至 R10、R15 和 R16 代表氢原子、羟基、芳基或具有 1 至 3 个碳原子的烷基;R11 和 R12 代表芳基或具有 1 至 3 个碳原子的亚烷基;Y 和 Z 代表单键或二价有机连接基团;A 代表具有颜料吸附部分的基团; B 代表具有通式 2 所示结构的基团; l 和 n 代表大于或等于 1 的整数; m 代表大于或等于 0 的整数; k 代表大于或等于 1 的整数。
Selective hydroesterification of alkynes to mono- or diesters
作者:Howard Alper、Bertrand Despeyroux、James B. Woell