(S)-3-amino-4-[(5-chloro-thiophene-2-carbonyl)-amino]-pyrrolidine-1-carboxylic acid tert-butyl ester 、
甲基磺酰氯 以to give (S)-3-[(5-chloro-thiophene-2-carbonyl)-amino]-4-methanesulfonylamino-pyrrolidine-1-carboxylic acid tert-butyl ester的产率得到(S)-3-[(5-chloro-thiophene-2-carbonyl)-amino]-4-methanesulfonylamino-pyrrolidine-1-carboxylic acid tert-butyl ester