作者:Amos B. Smith、Ryan C. Holcomb、Mark C. Guzman、Terence P. Keenan、Paul A. Sprengeler、Ralph Hirschmann
DOI:10.1016/s0040-4039(00)60058-8
日期:1993.1
A new two-step method employs the intramolecular cyclization of metalated imino esters for the construction of scalemic 3,5,5-trisubstituted pyrrolin-4-ones (4). The imino esters in turn derive from alpha-disubstituted amino acids, the latter readily available via a new protocol exploiting the enantioretentive alkylation of oxazolidinones.