3'-hydroxy-4,4'-dimethoxy-3'-methyl-3-oxo-7,7'-bis(piperidin-1-ylcarbonyloxy)-2,2'-spirobi[2H,2'H,3H,3'H-benzo[b]thiophene] 在
甲烷磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以86%的产率得到6-methoxy-2-(4'-methoxy-3'-methyl-7'-(piperidin-1-ylcarbonyloxy)benzo[b]thiophen-2-ylthio)-3-(piperidin-1-ylcarbonyloxy)benzoic acid