Strictly regio- and stereo-controlled α-alkenylation of bicyclic enone derivatives via palladium-catalyzed cross coupling and its application to a formal synthesis of (±)-carbacyclin
作者:Ei-ichi Negishi、Milan Pour、Frederik E. Cederbaum、Martin Kotora
DOI:10.1016/s0040-4020(98)00347-0
日期:1998.6
A formal synthesis of carbacylin was achieved by preparing a known advanced intermediate 15via Zr-promoted enyne bicyclization-carbonylation, Pd-catalyzed α-alkenylation of bicyclic enones, and conjugate reduction.
Strictly regio-controlled method for α-alkenylation of cyclic ketones via palladium-catalyzed cross coupling
作者:Ei-ichi Negishi、Zbyslaw R. Owczarczyk、Douglas R. Swanson
DOI:10.1016/0040-4039(91)80010-4
日期:1991.1
Cyclic α-iodoenones and α-triflyloxyenones, but not α-bromoenones, smoothly react with alkenylzinc and related derivatives in the presence of a catalytic amount of a palladium-phosphine complex, such as Pd(PPh3)4 or Cl2Pd(PPh3)2 treated with n-BuLi (2 equiv), to give α-alkenylenones which can be conjugately reduced to the corresponding α-alkenyl ketones with complete retention of both enone regiochemistry