Synthesis of new α,α-difluoro-γ-lactones through intramolecular radical cyclization as a key reaction
作者:Toshiyuki Itoh、Hiroyuki Ohara、Sachie Emoto
DOI:10.1016/0040-4039(95)00518-h
日期:1995.5
Carbon radicals from allyl o-trimethylsilyl-alpha-bromo-alpha,alpha-difluoroacetals can cyclize onto olefines regiospecifically to give gamma-lactols in good yield. These lactols have been converted to the corresponding alpha,alpha-difluoro-gamma-lactones. The first synthesis of three new alpha,alpha-difluoro-gamma-lactones has been accomplished.