Palladium-catalyzed stereospecific carboalkoxylation of 1,2-difluoro-1-iodoalkenes and α,β-difluoro-β-iodostyrenes
作者:Craig A. Wesolowski、Donald J. Burton
DOI:10.1016/s0040-4039(99)00216-6
日期:1999.3
(E)- and(Z)-1,2-Difluoro-1 -iodoalkenes and(E)- and(Z)-alpha, beta-difluoro-beta-iodostyrenes give the corresponding esters in the presence of catalytic Cl2Pd(PPh3)(2), alcohol, trialkylamine, and carbon monoxide (80-180psi) under mild conditions in excellent yields with retention of configuration. (C) 1999 Elsevier Science Ltd. All rights reserved.
Copper(II) Mediated Homo-Coupling of 1,2-difluorovinylstannanes
作者:Eric J. Blumenthal、Donald J. Burton
DOI:10.1002/ijch.199900012
日期:——
reaction of substituted 1,2-difluorovinylstannanes with anhydrous Cu(OAc)2 in dimethylformamide, under an oxygen atmosphere, at room temperature stereospecifically gives the corresponding symmetrical 1,3-dienes in good to excellent yields. Moisture drastically reduces the yield of homo-coupled product and produces significant amounts of RCF=CFH. The Cu(II) promoted homo-coupling of the fluorinated vinylstannanes