2-[(1,2-Dimethyl-3-indolyl)carbonyl]-5-dimethylaminobenzoic acid 、
N,N,N',N'-四甲基苯-1,3-二胺 以
乙酸酐 为溶剂,
以to obtain 3-[2,4-bis(dimethylamino)phenyl]-3-(1,2-dimethyl-3-indolyl)-6-dimethylaminophthalide (Formula III的产率得到3-(2,4-bis-dimethylamino-phenyl)-6-dimethylamino-3-(1,2-dimethyl-indol-3-yl)-3
H-isobenzofuran-1-one