Fe(<scp>ii</scp>)-Catalyzed alkenylation of benzylic C–H bonds with diazo compounds
作者:Jiang-Ling Shi、Qinyu Luo、Weizhi Yu、Bo Wang、Zhang-Jie Shi、Jianbo Wang
DOI:10.1039/c9cc01060b
日期:——
We report herein an alkenylation of benzylic C(sp3)–H bonds with diazocompounds via carbon cation intermediates with DDQ as the oxidant in the presence of a catalytic amount of Fe(II). Diphenylmethane, toluene, benzyl methyl sulfide and their derivatives could be applied as substrates to afford the tetra-substituted olefin products, which may serve as useful building blocks in organic synthesis.
Some alkynes were diarylated by aryltributylstannane 2 in the presence of palladium salt in moderate to good yield with high stereoselectivity. The reaction was catalytic in palladium using copper(II) chloride dihydrate as a reoxidant.
Titanium‐Catalyzed Exhaustive Reduction of Oxo‐Chemicals
作者:Bo Han、Chunping Ren、Min Jiang、Lipeng Wu
DOI:10.1002/anie.202209232
日期:2022.11.14
A catalytic system involving titanium used for the exhaustive reduction of carboxylic acid derivatives to the corresponding methyl compounds is reported. The catalytic system also works with other types of oxo-chemicals such as alcohols, aldehydes, ketones, lactones, and carboxylates while the products might be promising for bio-applications. Preliminary mechanistic studies reveal that the in situ
报道了一种涉及钛的催化体系,用于将羧酸衍生物彻底还原为相应的甲基化合物。该催化系统还适用于其他类型的含氧化学物质,如醇、醛、酮、内酯和羧酸盐,而这些产品可能在生物应用方面很有前景。初步机理研究表明,原位产生的 Ti III -H 物种是这种转变的关键。
Binder for anti-fouling paints
申请人:COURTAULDS COATINGS (HOLDINGS) LIMITED
公开号:EP0204444A1
公开(公告)日:1986-12-10
An anti-fouling marine paint comprises a pigment, a marine biocide which may or may not be identical to the pigment and a film-forming binder which is a hydrolysable polymer which contains units of the formula:
and can be obtained by polymerisation of an alpha-aryl alkyl. ester having the formula:
where R is an alpha, beta-unsaturated organic group, each Ar independently is an aryl group and R' is a hydrogen atom or an alkyl or aryl group.
一种防污船用涂料包括一种颜料、一种船用杀菌剂(可以与颜料相同,也可以不相同)和一种成膜粘合剂,后者是一种可水解的聚合物,含有式中的单元:
可通过聚合具有以下式子的α-芳基烷基酯而得到:
其中 R 是α、β-不饱和有机基团,每个 Ar 独立地是芳基,R'是氢原子或烷基或芳基。
Weitz; Scheffer, Chemische Berichte, 1921, vol. 54, p. 2343