Synthesis of the carbapenam system from glutamic acid and acetoacetic acid derivatives
作者:Mario D. Bachi、Ron Breiman、Haim Meshulam
DOI:10.1021/jo00157a010
日期:1983.5
cis -Selective synthesis of 2,5-disubstituted pyrrolidines
作者:Syed Raziullah Hussaini、Mark G. Moloney
DOI:10.1016/j.tetlet.2003.12.021
日期:2004.2
A concise approach to cis-2,5-disubstituted pyrrolidines is reported, which relies upon N-tert-butoxycarbonylmethyl substitution in a substrate derived from pyroglutamic acid. The method is especially noteworthy since a significant improvement in the conditions for a key Lawesson’s reaction have been established. Regioselective enolate generation and alkylation permits extension of the C-5 side chain