Influence of the gegenion in the transmetalation reaction of vinylic tellurides with higher order cyanocuprates
作者:André Chieffi、João V. Comasseto
DOI:10.1016/s0040-4039(00)73112-1
日期:1994.6
Dilithium cyanocuprates R2LCu(CN)Li2 (L=2-Th, Me) react with vinylictellurides of Z configuration, RCHCHTeR1 to give higherordervinyliccyanocuprates, [(RCHCH)LCu(CN)Li2]. By changing the gegenion from lithium to magnesium [R2LCu(CN)LiMgBr or R2LCu(CN)(MgBr)2] the reaction gives cross - coupling products of Z configuration, RCHCHR2 in good yields.
Novel cross-coupling reactions between organotellurides and Grignard reagents employing a MnCl2/CuI catalytic system
作者:Marcio S. Silva、Renan S. Ferrarini、Bruno A. Sousa、Fabiano T. Toledo、João V. Comasseto、Rogério A. Gariani
DOI:10.1016/j.tetlet.2012.04.134
日期:2012.7
We present a general protocol for the cross-coupling reaction of Grignardreagents and organic tellurides. Aryl Grignardreagents react stereospecifically with vinyl tellurides in the presence of a catalytic amount of manganese (II) chloride and copper (I) iodide to produce good yields of the corresponding cross-coupling products.
Vinyllithiums from butyl-vinyl tellurides and bis-vinyl tellurides
作者:Simone M. Barros、João V. Comasseto、Jorge Berriel
DOI:10.1016/s0040-4039(00)70695-2
日期:1989.1
Butyl vinyl tellurides and bis-vinyl tellurides furnish vinyllithiums with retention of configuration in good yields upon treatment with n-butyllithium at −78°C.
丁基乙烯基碲化物和双乙烯基碲化物提供乙烯基锂,并在-78°C下用正丁基锂处理时,结构保持高收率。
The coupling of butylvinyltellurides with organometallic reagents catalysed by nickel complexes
作者:Cristiano Raminelli、João Gargalaka、Cláudio C. Silveira、João V. Comasseto
DOI:10.1016/j.tet.2007.06.057
日期:2007.9
Vinylic tellurides couple efficiently with sp, sp(2) and sp(3) hybridised organometallic compounds (Li, MgX and Zn species) in the presence of dichloro-bis( triphenylphosphine) nickel(II) as catalyst. (c) 2007 Elsevier Ltd. All rights reserved.
Coupling of butyl vinyl tellurides with metal acetylides catalyzed by nickel complexes
作者:Cristiano Raminelli、João Gargalaka、Cláudio C. Silveira、João V. Comasseto
DOI:10.1016/j.tetlet.2004.04.120
日期:2004.6
Z-Vinylic tellurides react with metal acetylides under nickel complexes catalysis to give Z-enynes and Z-enediynes in good yields. (C) 2004 Elsevier Ltd. All rights reserved.