(E)-(1-(3-carboxypropyl)-2,2-dimethyl-6-((4-nitrophenyl)diazenyl)-1,2-dihydroquinolinium-4-yl)methanesulfonate 、 disodium 4-(7-hydroxy-2,2-dimethyl-4-(sulfonatomethyl)quinolin-1(2H)-yl)butanoate 在
sodium acetate 、
溶剂黄146 作用下,
以
水 为溶剂,
反应 6.0h,
以3%的产率得到sodium (1,11-bis(3-carboxypropyl)-2,2,10,10-tetramethyl-2,10-dihydro-1H-dipyrido[3,2-b:2',3'-i]phenoxazine-11-ium-4,8-diyl)dimethanesulfonate