(3-Bromo-4-methoxy-phenyl)-(2,3-dihydro-pyrido[3,4-b][1,4]oxazin-1-yl)-methanone 、 、
三溴化硼 在
(3-bromo-4-hydroxy-phenyl)-(2,3-dihydro-pyrido[3,4-b][1,4]oxazin-1-yl)-methanone 作用下,
以to obtain the target compound 40, i.e., (3-bromo-4-hydroxy-phenyl)-(2,3-dihydro-pyrido[3,4-b][1,4]oxazin-1-yl)-methanone的产率得到(3-bromo-4-hydroxy-phenyl)-(2,3-dihydro-pyrido[3,4-b][1,4]oxazin-1-yl)-methanone