New Chiral Building Blocks from Tetrabromocyclopropene and Furan
作者:Phillip M. Pelphrey、Khalil A. Abboud、Dennis L. Wright
DOI:10.1021/jo048991c
日期:2004.10.1
cyclocondensation of tetrabromocyclopropene and furan leads directly to a halogenated oxabicyclo[3.2.1]octadiene derivative. Over the past several years, we have utilized these compounds as intermediates for natural product synthesis. Herein, we describe the preparation of nonracemic dibromoenone buildingblocksfrom the racemic cycloadduct. Conversion of the adduct to a mixture of tartrate-derived ketals followed