Synthesis of macrocyclic ketoesters by an n + 1 strategy based on free-radical carbonylation
作者:Kiyoto Nagahara、Ilhyong Ryu、Hiroshi Yamazaki、Nobuaki Kambe、Komatsu Mitsuo、Noboru Sonoda、Akio Baba
DOI:10.1016/s0040-4020(97)01048-x
日期:1997.10
(or tin hydride) was achieved under freeradical reaction conditions. The allyltin mediated reaction of 1 also proceeded successfully to furnish 2-allyl-substituted 4-oxolactones 3 in moderate to good yields. In this n + 1 type macrocyclization, high dilution conditions () are beneficial for both the intermolecular trapping of CO and the intramolecular acyl radical addition to the CC double bond.