2-Formyl-3-hydroxy-5-methoxy-6-methyl-benzoic acid 5-((R)-1-methoxycarbonyl-2-tritylsulfanyl-ethylcarbamoyl)-pentyl ester 在
三乙基硅烷 、
三氟乙酸 作用下,
反应 2.0h,
以67%的产率得到(R)-17-hydroxy-15-methoxy-14-methyl-6,13-dioxo-3,4,5,6,7,8,9,10,11,13-decahydro-1H-12,2,5-benzoxathiaazacyclopentadecine-4-carboxylic acid methyl ester