Handy access to chiral N,N′-disubstituted 3-aminopyrrolidines.
作者:Jacques Maddaluno、Aline Corruble、Valéric Leroux、Gérard Plé、Pierre Duhamel
DOI:10.1016/s0957-4166(00)82081-9
日期:1992.10
A new and rapid synthesis of (S)-3-aminopyrrolidines 7 is proposed from N-protected (S)-Asparagine. Basic cyclization of methyl N-Z-(S)-Asparaginate 1 followed by one-pot N-benzylation directly leads to (S)-aminosuccinimide 3 which, after cleavage of the Z-protecting group, is converted to corresponding imines and readily reduced to disubstituted chiral 3-aminopyrrolidines 7. Almost no racemization (less-than-or-equal-to 5%) of the original amino-acid asymmetric center may be observed.