(rac)-3-[(2-chloro-5-nitro-pyrimidin-4-yl)-cyclohexyl-amino]-2-methyl-propanoic acid ethyl ester 在
铁粉 乙酸乙酯 、
水 、
ammonium hydroxide 、
magnesium sulfate 、 silica gel 、
ethyl acetate dichloromethane 、 dichloromethane-hexanes 作用下,
以
溶剂黄146 为溶剂,
反应 2.0h,
以to give 1.48 g of (rac)-2-chloro-9-cyclohexyl-7-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VI-18) as white needles的产率得到(rac)-2-chloro-9-cyclohexyl-7-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one