靛红酸酐 、 6-chloro-N-(4-chlorophenyl)-1,1-dioxo-3-(phenylamino)-1,4,2-benzodithiazine-7-carboxamide 以
甲苯 为溶剂,
反应 44.0h,
以95%的产率得到6'-chloro-N-(4-chlorophenyl)-1',1',2,6-tetraoxo-5-phenyl-1,2,5,6-tetrahydrospiro[4H-benzo[d][1,3,7]oxadiazocine-4,3'(2'H)-[1,4,2]benzodithiazine]-7'-carboxamide