6-[4-(3-Hydroxymethyl-piperidine-1-sulfonyl)-phenyl]-2-oxo-1,2-dihydro-pyridine-3-carboxylic acid 、
N,N'-二环己基碳二亚胺 、
N-(6-{4-[bis-(2-hydroxy-ethyl)-sulfamoyl]-phenyl}-2-oxo-1,2-dihydro-pyridine-3-carbonyloxy)-succinimide 以
N,N-二甲基甲酰胺 为溶剂,
以is obtained 6-[4-(3-hydroxymethyl-1-piperidinylsulfonyl)phenyl]-1,2-dihydro-2-oxonicotinic acid, 2,5-dioxo-1-pyrrolidinyl ester的产率得到6-[4-(3-Hydroxymethyl-piperidine-1-sulfonyl)-phenyl]-2-oxo-1,2-dihydro-pyridine-3-carboxylic acid 2,5-dioxo-pyrrolidin-1-yl ester