Organo-photoredox-Catalyzed Atom-Transfer Radical Substitution of Alkenes with α-Carbonyl Alkyl Halides
作者:Goki Hirata、Taisei Shimada、Takashi Nishikata
DOI:10.1021/acs.orglett.0c03359
日期:2020.11.20
(ATRS) and carboesterification reaction of alkenes with alkyl halides has been developed using PTH as the organo-photoredox catalyst. Two types of products were obtained, depending on the additive and solvent used during the reaction. Primary, secondary, and tertiary alkyl halides reacted to give the ATRS products. This protocol has several advantages: it requires mild reaction conditions and a low catalyst
Tandem Reactions Enable Trans- and Cis-Hydro-Tertiary-Alkylations Catalyzed by a Copper Salt
作者:Kimiaki Nakamura、Takashi Nishikata
DOI:10.1021/acscatal.6b03343
日期:2017.2.3
synthesize trans- and cis-alkenes via well-controlled hydroalkylation of alkyl radicals to alkynes is reported. α-Bromocarbonyl compounds are useful alkyl radical precursors in the presence of Cu(I) catalysts. Under copper catalyst conditions and in the presence of silane or alcohol/B2pin2, trans- and cis-hydroalkylation occurred with excellent stereoselectivities. The judicious choice of additives allowed for
一种方法来合成反式-和顺式-烯烃通过良好控制的烷基基团,以炔烃的加氢烷基化报告。在Cu(I)催化剂存在下,α-溴羰基化合物是有用的烷基自由基前体。在铜催化剂条件下,在硅烷或醇/ B 2 pin 2的存在下,发生反式和顺式加氢烷基化反应,并具有出色的立体选择性。明智地选择添加剂可以实现这种立体发散,从而可以选择性地获得具有高收率的HSiTMS 3的反烷基化烯烃和t - BuOH / B 2 pin 2的顺式烷基化烯烃。
A nickel catalyst for the arylation and vinylation of lithium ester enolates