Benzoic acid 3-[(3aR,6R,7R,7aR)-6-benzyloxycarbonylamino-7-(tert-butyl-dimethyl-silanyloxy)-2,2-dimethyl-3a,6,7,7a-tetrahydro-benzo[1,3]dioxol-4-yl]-propyl ester 在
sodium tetrahydroborate 、
臭氧 作用下,
生成
Benzoic acid (S)-4-{(4R,5R)-5-[(1R,2R)-2-benzyloxycarbonylamino-1-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-propyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-4-hydroxy-butyl ester