靛红酸酐 、 N-(6-chloro-1,1-dioxo-7-methyl-1,4,2-benzodithiazin-3-yl)-N'-benzylguanidine 以
甲苯 为溶剂,
反应 44.0h,
以97%的产率得到5-(N-benzylcarbamimidoyl)-6'-chloro-7'-methyl-1',1'-dioxospiro[4H-benzo[d][1,3,7]oxadiazocine-4,3'(2'H)-[1,4,2]benzodithiazine]-2,6(1H,5H)dione