The reaction of N-acylamino-2-bromoacetes 2 (via N-acylimino acetates 3) with higher order mixed cuprates, trimethysilyl enol ether and β-dicarbonyl compounds leads to a variety of α- amino acid derivatives. Their conversion into the free amino acids can be conveniently carried out by the use of t-butyl protection. In case of the N-acetyl compounds cleavage of the protecting group and optical resolution can be achieved in one step by hog renal ...
