(1-ethyl-2-methylindol-3-yl)-(2-carboxy-3,4,5,6-tetrachlorophenyl)ketone 、
N,N,N',N'-Tetraethyl-m-phenylendiamin 以
乙酸酐 为溶剂,
以to obtain 3-[2,4-bis(diethylamino)phenyl]-3-(1-ethyl-2-methyl-3-indolyl)-4,5,6,7-tetrachlorophthalide (Formula III的产率得到3-(2,4-bis-diethylamino-phenyl)-4,5,6,7-tetrachloro-3-(1-ethyl-2-methyl-indol-3-yl)-3
H-isobenzofuran-1-one