(4-Hydroxy-1,3-benzodioxol-5-yl) 4-methylbenzenesulfonate 、
(1R,2R,7R,8R,9S)-12-bromo-8-hydroxy-14,15-dimethoxy-13-methyl-17-(4-methylphenyl)sulfonyl-6-oxa-3,17-diazatetracyclo[7.7.1.02,7.011,16]heptadeca-3,11,13,15-tetraen-5-one 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以89%的产率得到[7-[(1R,2R,4R,7R,8R,9S)-12-bromo-8-hydroxy-14,15-dimethoxy-13-methyl-17-(4-methylphenyl)sulfonyl-5-oxo-6-oxa-3,17-diazatetracyclo[7.7.1.02,7.011,16]heptadeca-11,13,15-trien-4-yl]-4-hydroxy-1,3-benzodioxol-5-yl] 4-methylbenzenesulfonate