5-fluoro-6-methyl-1-(1-(3-methylpyrrolidin-3-yl)piperidin-4-yl)indolin-2-one 、
氯甲酸甲酯 在
crude product 、
乙腈 、
水 作用下,
以to give the title compound (0.113 g, 97%) as solid的产率得到methyl 3-(4-(5-fluoro-6-methyl-2-oxoindolin-1-yl)piperidin-1-yl)-3-methylpyrrolidine-1-carboxylate