Piperidine-4-carboxylic acid 3-(1-methyl-1H-indol-3-yl)-4-(1-methyl-6-nitro-1H-indol-3-yl)-2,5-dioxo-2,5-dihydro-pyrrol-1-ylmethyl ester trifluoroacetate 、
碳酸氢钠 在
乙酸乙酯 、
水 作用下,
以
乙酸乙酯 为溶剂,
以to give the desired product (yield—97%)的产率得到Piperidine-4-carboxylic acid 3-(1-methyl-1H-indol-3-yl)-4-(1-methyl-6-nitro-1H-indol-3-yl)-2,5-dioxo-2,5-dihydro-pyrrol-1-ylmethyl ester acetate salt