(3R,4S)-3-(tert-Butyl-dimethyl-silanyloxy)-2-oxo-4-phenyl-azetidine-1-carboxylic acid tert-butyl ester 、
在
氢氟酸 、
sodium hexamethyldisilazane 作用下,
生成 [(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-diacetyloxy-14-ethyl-1,9-dihydroxy-15-[(2R,3S)-2-hydroxy-3-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoyl]oxy-10,17,17-trimethyl-11-oxo-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate