Hk. Zhang et al., A versatile approach to protected (S)-aspartimide, (4S)-amino-2-pyrrolidinone and (3S)-aminopyrrolidine from (S)-aspartic acid, SYN COMMUN, 30(13), 2000, pp. 2431-2444
Starting from (S)-aspartic acid, a versatile approach to (S)-1-benzyl-3-p-t
oluenesulfonylamino-2, 5 -pyrrolidinedione, (S)-1-benzyl-4-p-toluenesulfony
lamino-2-pyrrolidinone and (S)-1-benzyl-3-p-toluenesulfonylaminopyrrolidine
is described.