7-benzyl-4-[2-(2-chloro-4,5-dimethoxyphenyl)ethyl]-4H,7H-pyridazino[4,5-b][1,4]oxazine-3,8-dione 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成 7-Benzyl-4-[2-(2-chloro-4,5-dimethoxy-phenyl)-ethyl]-3-hydroxy-3,4-dihydro-2H,7H-pyridazino[4,5-b][1,4]oxazin-8-one