Palladium(0)-catalyzed cyclization-carbonylation of 2,7-octadienyl acetate and homologues
作者:Masahiko Terakado、Kouya Murai、Masahiro Miyazawa、Keiji Yamamoto
DOI:10.1016/s0040-4020(01)85639-8
日期:——
The palladium(0)-catalyzed carbonylations, in acetic acid as a necessary solvent, of 2,7-octadienyl acetate and homologues via pi-allylpalladium species were preceded by their intramolecular oelfin insertion to form mixtures of cis/trans-2-vinylcyclopentylacetyl- and cis/trans-cyclohexylacetylpalladium intermediates, which undergo further the intramolecular (5-exo) Heck reaction to give bicyclo-[3.3.0] and [4.3.0] skeletons, respectively, except for one case affording trans-2-vinylcyclopentylacetic acid as a major product.