Copper(I) <i>tert</i>-Butoxide-Promoted 1,4 C<sup>sp</sup><sup><sup>2</sup></sup>-to-O Silyl Migration: Generation of Vinyl Copper Equivalents and Their Stereospecific Cross-Coupling with Allylic, Aryl, and Vinylic Halides
作者:Haruhiko Taguchi、Kazushi Ghoroku、Makoto Tadaki、Akira Tsubouchi、Takeshi Takeda
DOI:10.1021/jo025973r
日期:2002.11.1
copper(I) tert-butoxide and allylic halides followed by the tetrabutylammonium fluoride-assisted hydrolysis produced the allylation products, 2,5-alkadien-1-ols, with complete retention of configuration. Similar treatment of the organometallic intermediates with aryl and vinylic halides in the presence of palladium(0) catalyst gave the corresponding cross-coupling products in good yields. The stereoselective
先用叔丁醇铜和烯丙基卤化物连续处理(Z)-γ-三甲基甲硅烷基烯丙基醇,再用四丁基氟化铵辅助水解,生成烯丙基化产物2,5-链二烯-1-醇,并完全保留配置。在钯(0)催化剂存在下,用芳基卤化物和乙烯基卤化物对有机金属中间体进行类似处理,从而以高收率得到相应的交叉偶联产物。还描述了原料的立体选择性制备。