Some derivatives of 3-aryl-2H-1,4-benzoxazine
Arylacyl esters of o-acetamidophenol, which are cyclized to 3-aryl-2H-1,4-benzoxazines by a saponification of the acetamido group, are obtained by the reaction of ω-bromomethyl aryl ketones with potassium o-acetamidophenoxide.