
%0 Journal Article
%A Teitei, T 
%T 7-Phenylindolo[3,2,1-<I>de</I>]phenanthridin-13-one, the Vilsmeier-Haack reaction product of 1,4-diphenylcarbazole
%J Australian Journal of Chemistry
%D 1970/01/01
%V 23
%N 1
%P 185-191
%K 
%R https://doi.org/10.1071/CH9700185
%U https://www.publish.csiro.au/paper/CH9700185 
%X Formylation of 1,4-diphenylcarbazole (la) under the conditions of the Vilsmeier-Haack reaction gave 7-phenylindolo[3,2,1-de]phenanthridin-13-one (2a), which brominated to give 6-bromo-7-phenylindolo[3,2,l-de]phenanthridin-13-one (2b). Treatment of the compounds (2a) and (2b) with sodium hydride and alkyl iodides yields l-(o-lkoxycarbonylphenyl)-9-alkyl-4-phenylcarbazoles (3a) and (3b) and the 3-bromo analogue (3c), respectively. The parent compound, indolo[3,2,1-de]- phenanthridin-13-one (2c), under the same reaction conditions also gave the ring-opened compound 1-(0-methoxycarbonylphenyl)-9-methylcarbazole (3d). 
