5-(o-fluorophenyl)-1,3-dihydro-1,3,3-trimethyl-7-nitro-2H-1,4-benzodiazepin-2-one 、 5-(o-chlorophenyl)-1,3-dihydro-1,3,3-trimethyl-7-nitro-2H-1,4-benzodiazepin-2-one 以
ethyl acetate dichloromethane 为溶剂,
以From 59 g (0.17 mol) of 5-(o-chlorophenyl)-1,3-dihydro-3,3-dimethyl-7-nitro-2H-1,4-benzodiazepin-2-one there is obtained, in analogy to the details in paragraph (c) of Example 1, 5-(o-chlorophenyl)-1,3-dihydro-1,3,3-trimethyl-7-nitro-2H-1,4-benzodiazepin-2-one of melting point 125°-127° (methylene chloride/ethyl acetate)的产率得到5-(o-chlorophenyl)-1,3-dihydro-3,3-dimethyl-7-nitro-2H-1,4-benzodiazepin-2-one