3-[(S)-3-((S)-2-Benzyloxycarbonylamino-4-methyl-pentanoylamino)-2-hydroxy-pentanoylamino]-propionic acid benzyl ester 在
2,2,6,6-tetramethyl-piperidine-N-oxyl 、
sodium chlorite 、 potassium bromide 作用下,
以80%的产率得到3-[(S)-3-((S)-2-Benzyloxycarbonylamino-4-methyl-pentanoylamino)-2-oxo-pentanoylamino]-propionic acid benzyl ester