(S)-2-[(5-{[Ethyl-(2-methyl-4-oxo-3,4-dihydro-quinazolin-6-yl)-amino]-methyl}-thiophene-2-carbonyl)-amino]-pentanedioic acid diethyl ester 在
sodium hydroxide 作用下,
以
乙醇 为溶剂,
反应 2.0h,
以57%的产率得到(S)-2-[(5-{[Ethyl-(2-methyl-4-oxo-3,4-dihydro-quinazolin-6-yl)-amino]-methyl}-thiophene-2-carbonyl)-amino]-pentanedioic acid