3,4-dihydro-8-fluoro-2H-1,4-benzoxazine-2-carboxamide 、 3,4-dihydro-8-methyl-2H-1,4-benzoxazine 2-ethyl carboxylate 在
dihydro-8-methyl-2H-1,4-benzoxazine-2-carboxamide 作用下,
以The title compound of formula (4c) is obtained的产率得到dihydro-8-methyl-2H-1,4-benzoxazine-2-carboxamide