Generation of allyllithium reagents by lithium-tetrahydrofuran reduction of allylic mesitoates. New procedure for selective allylic cross coupling and allylcarbinol synthesis
Regioreversed nucleophilic substitution of 2-(allyloxy)benzothiazole by allylic Grignard reagents. A regioselective synthesis of 1,5-dienes
作者:Vincenzo Calo、Luigi Lopez、Giannangelo Pesce
DOI:10.1039/p19880001301
日期:——
2-(Allyloxy)benzothiazoles react with allylic organomagnesium compounds in the presence of copper bromide to give 1,5-dienes. The C–C coupling occurs almost exclusively in a head-to-tail fashion. Contrary to this the same electrophiles, when complexed with copper(I) bromide before the addition of the allylicGrignardreagents, give only 1,5-dienes derived from a head-to-head coupling process. The change
Regioreversed nucleophilic substitution of 2-(allyloxy)benzothiazoles by allylic Grignard reagents governed by anchimeric co-ordination. A selective and flexible synthesis of 1,5-dienes
作者:Vincenzo Calò、Luigi Lopez、Giannangelo Pesce
DOI:10.1039/c39850001357
日期:——
The regioselectivity in the C–C coupling process of 2-(allyloxy)benzothiazoles with allyl organomagnesium compounds is influenced by the co-ordination of the heterocycle by the organometallic reagent.