alpha-(chlorodifluoromethyl)-alpha-(trifluoromethyl)-2,3-dihydro-1H-indole-5-methanol 、 1-(1,3-dioxobutyl)-2,3-dihydro-1H-indole-5-methanol 以
硫酸 为溶剂,
以to give 1,2-dihydro-8 [2-chloro-2,2-difluoro-1-hydroxy-1-(trifluoromethyl)ethyl]-6-methyl-4H-pyrrolo[3,-2,1-ij]quinolin-4-one, m.p. 294°-295°的产率得到1,2-dihydro-8-[2-chloro-2,2-difluoro-1-hydroxy-1-(trifluoromethyl)ethyl]-6-methyl-4H-pyrrolo[3,2,1-ij]quinoline-4-one