(2Z,4E,6Z,8R,9S,11E,13E)-6-bromo-8-(tert-butyl-dimethyl-silanyloxy)-15-oxo-9-[(6-deoxy-2,3,4-trimethyl-O-methyl-α-L-mannopyranosyl)oxy]-hexadeca-2,4,6,11,13-pentaenoic acid methyl ester 在
甲基二氯化铝 作用下,
以
正己烷 、
二氯甲烷 为溶剂,
反应 1.5h,
以92%的产率得到(1R,2S,3aS,4S,5R,7aS)-3-[7-bromo-1-(tert-butyl-dimethyl-silanyloxy)-4-(3-oxo-but-1-enyl)-2-[(6-deoxy-2,3,4-trimethyl-O-methyl-α-L-mannopyranosyl)oxy]-2,3,3a,4,5,7a-hexahydro-1H-inden-5-yl]-acrylic acid methyl ester