Reaction of 1-bromo-1,2-dienes with alkylcuprates as a regio- and stereo-selective route to acetylenic or allenic compounds
作者:Carmela Polizzi、Carla Consoloni、Luciano Lardicci、Anna Maria Caporusso
DOI:10.1016/0022-328x(91)80179-n
日期:1991.10
Alkylcuprates react with 1-bromo-1,2-dienes to give allenic and/or acetylenic products. The selectivity of the crosscoupling is markedly dependent on the nature of the copper reagent, which plays a prominent role in determining both the regio- and the stereo-chemistry. The preparative aspects of these copper-induced reactions are discussed and their possible mechanism discussed.
Coupling of chiral 1-bromo-1,2-dienes with zinc-based cuprates: a new procedure for the regio and stereoselective synthesis of functionalized acetylenic compounds
作者:Anna Maria Caporusso、Sara Filippi、Federica Barontini、Piero Salvadori
DOI:10.1016/s0040-4039(99)02249-2
日期:2000.2
are found to be active in the cross-coupling reaction with allenic bromides affording acetylenic products with a high regio and stereoselective 1,3-anti substitution. The coupling process, which has been successfully extended to functionalized cuprates, can also be performed with alkylzinc chlorides in the presence of catalytic amounts of cuproussalts.