Regioselective SN′ allylic substitution versus 1,4-addition: Synthesis of α-substituted β,γ-unsaturated esters
作者:C Girard、I Romain、M Ahmar、R Bloch
DOI:10.1016/s0040-4039(00)70708-8
日期:1989.1
The reaction of the higher order organocuprate reagents R2Cu(CN)Li2-BF3 with γ-bromo α,β-unsaturated esters gives with very high selectivity α-substituted β,γ-unsaturated esters arising from a SN′ allylic substitution. This reaction allows an easy access to α-silyl β,γ-unsaturated esters.
高阶有机铜试剂R 2 Cu(CN)Li 2 -BF 3与γ-溴α,β-不饱和酯的反应产生了非常高的选择性,这是由SN'烯丙基取代产生的α-取代的β,γ-不饱和酯。该反应使得容易获得α-甲硅烷基β,γ-不饱和酯。