Diastereoselective alkynylation of glucose-modified imines with terminal alkynes
摘要:
The copper(I)-catalyzed enantioselective alkynylation of aldimines incorporating a 2,3,4,6-tetrakis-O-pivaloyl-D-glucopyranosyl (Piv(4)Glc) chiral auxiliary with terminal alkynes is reported. The present system provides a versatile tool for the construction of optically active propargylamine derivatives Good. yields and enantiomeric excess values were achieved with an array of imines and biologically active, propargylamine derivatives. (C) 2009 Elsevier Ltd. All rights reserved.