二甲胺 、
4-Methoxy-6-(3,3,6,6-tetramethyl-1,8-dioxo-2,3,4,5,6,7,8,9-octahydro-1H-xanthen-9-yl)-benzene-1,3-disulfonyl dichloride 以
甲醇 为溶剂,
以42%的产率得到4-Methoxy-6-(3,3,6,6-tetramethyl-1,8-dioxo-2,3,4,5,6,7,8,9-octahydro-1H-xanthen-9-yl)-benzene-1,3-disulfonic acid bis-dimethylamide