Free radical macrocyclisation via propiolate esters.
作者:Jack E. Baldwin、Robert M. Adlington、Steve H. Ramcharitar
DOI:10.1016/0040-4020(92)85015-7
日期:1992.1
Intramolecular free-radical addition to propiolate esters has provided a new and a stereoselective route to 14–16 membered -α,β-unsaturated macrocylic lactones from their corresponding ω-iodoalkyl-propionate esters under triphenyltin hydride/AIBN mediated conditions. Attemps to synthesise analogous 10–13 membered lactones proved unsuccessful, resulting in acyclic products derived from direct reduction at the