(E)-(S)-4-Azido-5-[(R)-2-tert-butoxycarbonylamino-3-(tert-butyl-dimethyl-silanyloxy)-propionylsulfanyl]-2-methyl-pent-2-enoic acid methyl ester 在
三苯基膦 作用下,
以
四氢呋喃 为溶剂,
以82%的产率得到(E)-3-{(S)-2-[(R)-1-tert-Butoxycarbonylamino-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4,5-dihydro-thiazol-4-yl}-2-methyl-acrylic acid methyl ester