Methyl (+/-)-7-formyl-4-methyl-3-oxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-2-acetate 、
2-(aminomethyl)benzimidazole dihydrochloride 在
silica gel sodium acetate 、 sodium cyanoborohydride 作用下,
以
甲醇 为溶剂,
以49%的产率得到Methyl (+/-)-7-[[[(2-benzimidazolyl)methyl]amino]methyl]-4-methyl-3-oxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-2-acetate