(rac)-3-[(2-chloro-5-nitro-pyrimidin-4-yl)-cyclopentyl-amino]-butanoic acid ethyl ester 在
铁粉 水 、
乙酸乙酯 、
ammonium hydroxide 、
magnesium sulfate 、 silica gel 、
methanol-dichloromethane 作用下,
以
溶剂黄146 为溶剂,
反应 2.17h,
以gave 0.45 g of (rac)-2-chloro-9-cyclopentyl-8-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VI-3) as a white solid的产率得到(rac)-2-chloro-9-cyclopentyl-8-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one