Enantiomerically pure pyrrolidinones were synthesized as endothelin receptor antagonists. A [2+2] cycloaddition of an imine and an enantiomerically pure acid chloride gave two diastereomeric beta-lactams which were separated and rearranged to give the enantiomerically pure pyrrolidinones which could be reduced to give the corresponding pyrrolidines. Copyright (C) 1996 Elsevier Science Ltd
机构:
ST BARTHOLOMEWS HOSP, COLL MED,WILLIAM HARVEY RES INST, LONDON EC1M 6BQ, ENGLANDST BARTHOLOMEWS HOSP, COLL MED,WILLIAM HARVEY RES INST, LONDON EC1M 6BQ, ENGLAND
机构:
ST BARTHOLOMEWS HOSP, COLL MED,WILLIAM HARVEY RES INST, LONDON EC1M 6BQ, ENGLANDST BARTHOLOMEWS HOSP, COLL MED,WILLIAM HARVEY RES INST, LONDON EC1M 6BQ, ENGLAND