New Diastereoselective Route to 2-Substitutedcis-(2S,5S)- andtrans-(2S,5R)-5-Alkylpyrrolidines as Indolizidine and Pyrrolizidine Scaffolds
作者:Antonio J. Mota、Angèle Chiaroni、Nicole Langlois
DOI:10.1002/ejoc.200300393
日期:2003.11
A new and short stereoselective route to the synthesis of enantiopure cis-2,5-disubstituted pyrrolidines as indolizidine or pyrrolizidine scaffolds has been developed. The method, which uses (S)-pyroglutamic acid as a chiral starting material, is based on the ring opening of N-protected γ-lactams by alkyl phenyl sulfone carbanions, followed by desulfonylation and reductive amination of alkyl γ-amino