ethyl 6-chloro-3-(4-fluorophenylamino)-1,1-dioxo-1,4,2-benzodithiazine-7-carboxylate 、
靛红酸酐 以
甲苯 为溶剂,
反应 44.0h,
以97%的产率得到ethyl 6'-chloro-5-(4-fluorophenyl)-1',1',2,6-tetraoxo-1,2,5,6-tetrahydrospiro[4H-benzo[d][1,3,7]oxadiazocine-4,3'(2'H)-[1,4,2]benzodithiazine]-7'-carboxylate