Diastereoselective syn or anti opening of propargylic epoxides. Synthesis of α-allenic alcohols
作者:A. Alexakis、I. Marek、P. Mangeney、J.F. Normant
DOI:10.1016/s0040-4020(01)96911-x
日期:1991.1
Propargylic epoxides easily react with Grignardreagents and catalytic amounts of copper(I) salt to afford α-allenic alcohols. The reaction is highly diastereoselective and its stereochemical outcome ( or isomer) can be fully controlled. The diastereomer, probably arising through an addition-elimination mechanism, is better obtained with RMgCl and copper(I) bromide, whereas the diastereomer, is better