7-[4-(1-methylindol-3-yl)-2,5-dioxo-3-pyrrolin-3-yl]benzo[b]fur-4-yl(trifluoromethyl)sulfonate 、
碘甲烷 在
potassium carbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 0.25h,
以98%的产率得到3-(trifluoro-methanesulfonic acid benzofur-7-yl ester)-4-[1-methyl-1H-indol-3-yl]-1-methylpyrrole-2,5-dione