ethyl-9',10'-difluoro-8'-nitro-7'-oxospiro[oxolane-3,3'-(2'H)-[7H]pyrido[1,2,3-de][1,4]benzoxazine]-6'-carboxylate 在
铁粉 N,N-二甲基甲酰胺 、
水 作用下,
以
溶剂黄146 为溶剂,
反应 5.0h,
以to yield ethyl 8′-amino-9′,10′-difluoro-7′-oxospiro[oxolane-3,3′(2′H)-[7H]pyrido[1,2,3-de][1,4]benzoxazine]-6′-carboxylate (1.54 g, 53%) as a colorless solid的产率得到ethyl-8'-amino-9',10'-difluoro-7'-oxospiro[oxolane-3,3'-(2'H)-[7H]pyrido[1,2,3-de][1,4]benzoxazine]-6'-carboxylate