The treatment of 1-benzenesulfonyl-3-cyanomethylindole (1) with LDA, in THF at 0°C, affords 2-(1-benzenesulfonyl-1H-indol-3-yl)-3-(1H-indol-3-yl)acrylonitrile (2) in 79% yield. From 2 , the indolo[2,3-a]carbazole (4) has been obtained in 58% yield.
Dimerization of 1-benzenesulfonyl-3-cyanomethylindole. Synthesis of indolo[2,3-a]carbazoles / E.M. Beccalli, M.L. Gelmi, E. Erba. - In: HETEROCYCLES. - ISSN 0385-5414. - 48:4(1998), pp. 735-741.
Dimerization of 1-benzenesulfonyl-3-cyanomethylindole. Synthesis of indolo[2,3-a]carbazoles
E.M. BeccalliPrimo
;M.L. GelmiSecondo
;E. ErbaUltimo
1998
Abstract
The treatment of 1-benzenesulfonyl-3-cyanomethylindole (1) with LDA, in THF at 0°C, affords 2-(1-benzenesulfonyl-1H-indol-3-yl)-3-(1H-indol-3-yl)acrylonitrile (2) in 79% yield. From 2 , the indolo[2,3-a]carbazole (4) has been obtained in 58% yield.
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