[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-acetyloxy-15-[(2R,3S)-3-(4-bromobutanoylamino)-2-[tert-butyl(dimethyl)silyl]oxy-3-phenylpropanoyl]oxy-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-9,12-bis(triethylsilyloxy)-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] 4-bromobutanoate 在
sodium sulfide 作用下,
以
丙酮 为溶剂,
反应 1.0h,
以50%的产率得到[(2R,4S,5S,7R,10S,11R,12S,24S,25R,28S,30S)-25-[tert-butyl(dimethyl)silyl]oxy-30-hydroxy-4,31,31,32-tetramethyl-3,14,22,26-tetraoxo-24-phenyl-2,5-bis(triethylsilyloxy)-8,13,27-trioxa-18-thia-23-azapentacyclo[26.3.1.04,11.07,10.012,30]dotriacont-1(32)-en-10-yl] acetate