Realization of Anti-SN2‘ Selective Allylation of 4-Cyclopentene-1,3-diol Monoester with Aryl- and Alkenyl-Zinc Reagents
摘要:
Anti-S(N)2' mode of allylation of the monoester of 4-cyclopentene-1,3-diol with aryl and alkenyl anions was achieved, for the first time, with the MeOCH2CO2 - group as a leaving group to which R-ZnBr and CuCl (as a catalyst) were best fitted. The aryl groups successfully installed were Ph, o- and p-MeC6-H-4, o-MOMOC6H4, o-MeOC6H4, and p-F-C6H4, while cis and trans alkenyl groups were attached with retention of the olefinic stereochemistries.