4-cyano-1-[(2-ethoxycarbonyl-acetyl)-(3-methyl-butyl)-amino]-1H-pyrrole-2-carboxylic acid methyl ester 、 、
sodium ethanolate 在
盐酸 、 Brine 、
乙酸乙酯 、
Sodium sulfate-III 、
6-cyano-4-hydroxy-1-(3-methyl-butyl)-2-oxo-1,2-dihydro-pyrrolo[1,2-b]pyridazine-3-carboxylic acid ethyl ester 作用下,
以
乙醇 为溶剂,
反应 16.0h,
以to afford the crude desired product, 6-cyano-4-hydroxy-1-(3-methyl-butyl)-2-oxo-1,2-dihydro-pyrrolo[1,2-b]pyridazine-3-carboxylic acid ethyl ester as a yellow solid, which的产率得到6-cyano-4-hydroxy-1-(3-methyl-butyl)-2-oxo-1,2-dihydro-pyrrolo[1,2-b]pyridazine-3-carboxylic acid ethyl ester