Carbonic acid allyl ester (2S,3S,4S,6R)-4-allyloxycarbonylamino-6-[(1S,3S)-3-(2-bromo-2-fluoro-acetyl)-3,5,12-trihydroxy-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacen-1-yloxy]-2-methyl-tetrahydro-pyran-3-yl ester 在
silver tetrafluoroborate 作用下,
以
二甲基亚砜 为溶剂,
以95%的产率得到Carbonic acid allyl ester (2S,3S,4S,6R)-4-allyloxycarbonylamino-6-[(1S,3S)-3-(2-fluoro-2-hydroxy-acetyl)-3,5,12-trihydroxy-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacen-1-yloxy]-2-methyl-tetrahydro-pyran-3-yl ester