Catalytic asymmetric hydrogenation of 1-aza-2-cycloalkene-2-carboxylates catalyzed by a trans-chelating chiral diphosphine PhTRAP-rhodium complex

Article abstract of DOI:10.1016/S0040-4039(99)01719-0

A rhodium complex coordinated with a trans-chelating chiral diphosphine (S,S)-(R,R)-PhTRAP was an effective catalyst for asymmetric hydrogenation of N-acyl-1-aza-2-cycloalkene-2-carboxylates, which gave the corresponding protected cyclic α-amino acids wit