tert-butyl [(1R,2S,13R,15R,16S)-15-cyano-13-[[[(2S)-2-(1,3-dioxoisoindol-2-yl)propanoyl]amino]methyl]-5-hydroxy-21-methoxy-6,20,24-trimethyl-8,10-dioxa-14,24-diazahexacyclo[14.7.1.02,14.04,12.07,11.018,23]tetracosa-4(12),5,7(11),18(23),19,21-hexaen-22-yl] carbonate 、
乙酰氯 在
吡啶 、
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以81%的产率得到[(1R,2S,13R,15R,16S)-15-cyano-13-[[[(2S)-2-(1,3-dioxoisoindol-2-yl)propanoyl]amino]methyl]-21-methoxy-6,20,24-trimethyl-22-[(2-methylpropan-2-yl)oxycarbonyloxy]-8,10-dioxa-14,24-diazahexacyclo[14.7.1.02,14.04,12.07,11.018,23]tetracosa-4,6,11,18(23),19,21-hexaen-5-yl] acetate