Copper(I) tert-butoxide-promoted 1,4 C sp 2-to-O silyl migration: generation of vinyl copper equivalents and their stereospecific cross-coupling with allylic, aryl, and vinylic halides.
Successive treatment of the (Z)-gamma-trimethylsilyl allylic alcohols with 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 preparation of the starting materials is also described.
Taguchi
Haruhiko
H
Department of Applied Chemistry, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
Ghoroku
Kazushi
K
Tadaki
Makoto
M
Tsubouchi
Akira
A
Takeda
Takeshi
T