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] 、
碘甲烷 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 3.0h,
以39%的产率得到2-[2'-acetyl-3'-methoxy-6'-(piperidin-1-ylcarbonyloxy)phenylthio]-3,4-dimethoxy-7-(piperidin-1-ylcarbonyloxy)benzo[b]thiophene