7-O-(三乙基硅烷基)浆果赤霉素III 、 (3R,4S)-2-Oxo-4-phenyl-3-triethylsilanyloxy-azetidine-1-carboxylic acid benzyl ester 在
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
以87%的产率得到[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-diacetyloxy-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-15-[(2R,3S)-3-phenyl-3-(phenylmethoxycarbonylamino)-2-triethylsilyloxypropanoyl]oxy-9-triethylsilyloxy-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate