(S)-1-(5-{2-[2-(2,2-Dimethyl-propionylamino)-4-oxo-3,4,5,6,7,8-hexahydro-pyrido[2,3-d]pyrimidin-6-yl]-ethyl}-thiophene-2-carbonyl)-azetidine-2-carboxylic acid methyl ester 在
sodium hydroxide 作用下,
反应 72.0h,
以38%的产率得到(S)-1-{5-[2-(2-Amino-4-oxo-3,4,5,6,7,8-hexahydro-pyrido[2,3-d]pyrimidin-6-yl)-ethyl]-thiophene-2-carbonyl}-azetidine-2-carboxylic acid