Palladium-Catalyzed ?Metallo-Ene?-Type Cyclization/Vinylstannane Coupling of 1-Acetoxy-octa-2,7-dienes and 1-Acetoxy-oct-2-en-7-ynes
作者:Wolfgang Oppolzer、Jos� Ruiz-Montes
DOI:10.1002/hlca.19930760313
日期:1993.5.12
Palladiumbis(dibenzylideneacetone)/tri(2-furyl)phosphine-catalyzed cyclizations of dienyl acetates 2 in the presence of an (1-alkenyl)(tributyl)stannane and ZnCl2 provided trans-substituted 3-alkenyl-4-vinylcyclopentanes 11 in good yields. Analogous intramolecular carbometallation/C,C-coupling of enynyl acetates 4, 6, and 8 furnished, stereospecifically, monocylic trienes 19, 20, and 21, respectively
Palladiumbis(二亚苄)/三(2-呋喃基)二烯基的膦催化环化乙酸盐2在(1 -链烯基)的存在下(三丁基)锡烷和的ZnCl 2提供反式-取代的3-链烯基-4- vinylcyclopentanes 11良好产量。类似的分子内carbometallation / C,enynyl的C-耦合乙酸盐4,6,和8的布置,立体有择地,单环三烯19,20,和21分别。