Pd-Catalyzed Carbonylation of Vinyl Triflates To Afford α,β-Unsaturated Aldehydes, Esters, and Amides under Mild Conditions
作者:Shaoke Zhang、Helfried Neumann、Matthias Beller
DOI:10.1021/acs.orglett.9b00765
日期:2019.5.17
An efficient and general protocol for the synthesis of α,β-unsaturated aldehydes, esters, and amides via carbonylation of vinyl triflates including derivatives of camphor, ketoisophorone, verbenone, and pulegone was developed. Crucial for these transformations is the use of a specific palladium catalyst containing a pyridyl-substituted dtbpx-type ligand. This procedure also allows for an easy access
开发了一种有效的通用方案,可通过乙烯基三氟甲磺酸酯的羰基化反应合成α,β-不饱和醛,酯和酰胺,包括樟脑,酮异佛尔酮,马鞭草酮和普乐酮。这些转化的关键是使用含有吡啶基取代的d t bpx型配体的特定钯催化剂。该方法还使得容易从相应的酮获得二羰基化产物。
Catalyst components for polymerization of alpha-olefins and a method for using them
申请人:TOA NENRYO KOGYO KABUSHIKI KAISHA
公开号:EP0044635A1
公开(公告)日:1982-01-27
A supported titanium-containing catalyst component which is useful for the polymerization of olefins, is obtained by contacting magnesium metal, a halogenated hydrocarbon of the general formula: RX (where R is an alkyl, aryl, or cycloalkyl group and X is a halogen atom) and an alkoxy compound of the general formula: R'mC(OR')4-m (where X' is a hydrogen atom, a halogen atom or an alkyl, aryl, or cycloalkyl group having 1 - 10 carbon atoms, R' is an alkyl, aryl, or cycloalkyl group having 1 - 20 carbon atoms, and m is 0, 1 or 2) to obtain a magnesium-containing solid and contacting said solid with a carboxylic acid or derivative thereof and thereafter with hydrogen chloride and finally with a titanium compound such as titanium tetrachloride. The catalyst component employed in combination with aluminium co-catalyst is useful for the polymerization of alpha-olefins.
将金属镁、通式为 RX(其中 R 为烷基、芳基或环烷基,X 为卤素原子)的卤代烃和通式为 RX(其中 R 为烷基、芳基或环烷基,X 为卤素原子)的烷氧基化合物接触,可获得一种用于烯烃聚合的支撑型含钛催化剂组分:RX(其中 R 是烷基、芳基或环烷基,X 是卤素原子)和通式如下的烷氧基化合物:R'mC(OR')4-m(其中 X'为氢原子、卤素原子或具有 1-10 个碳原子的烷基、芳基或环烷基,R'为具有 1-20 个碳原子的烷基、芳基或环烷基,m 为 0、1 或 2)以获得含镁固体,并将所述固体与羧酸或其衍生物接触,然后与氯化氢接触,最后与钛化合物如四氯化钛接触。与铝助催化剂结合使用的催化剂组分可用于α-烯烃的聚合。
Coating compositions and methods for preventing adhesion of organisms
申请人:KANSAI PAINT CO. LTD.
公开号:EP0331147A2
公开(公告)日:1989-09-06
Disclosed are a coating composition (A) for preventing adhesion of organisms which comprises as its vehicle component a homopolymer or a copolymer, the homopolymer being one prepared by homopolymerizing a phenol-modified unsaturated monomer obtained by reacting (a) an unsaturated monomer containing epoxy group and/or hydroxyl group with (b) an addition reaction product of a phenolic compound with a compound having one carboxylic anhydride group per molecule, and the copolymer being one prepared by copolymerizing said phenol-modified unsaturated monomer and a radically polymerizable unsaturated monomer, and also a coating composition (B) for preventing adhesion of organisms which comprises as its vehicle component a phenol-modified resin prepared by reacting (c) a resin containing epoxy group and/or hydroxyl group with (b) an addition reaction product of a phenolic compound with a compound having one carboxylic anhydride group per molecule.
Also disclosed is a method for preventing adhesion of organisms, characterized by coating a substrate with the coating composition (A) or (B).