Preparation of 6-bromo-2H-1

background and overview[1][2] 6-bromo-2h-1,4-benzoxazin-3(4h)-one is an organic intermediate that can be prepared in one step. a class of drugs with ppar agonistic activity can be prepared. preparation[1-2] method 1 weigh 2-amino-4-bromophenol (2.5g, 13mmol) and add it to the three-necked flask, measure 80ml of tetrahydrofuran and add it to the system, and measure and add triethylamine…