Chemistry of Heterocyclic Compounds p. 1235 - 1238 (1990)
Update date:2022-08-04
Topics:
Krichevskii, E. S.
Alekseeva, L. M.
Granik, V. G.
N-Alkylation of 2-methyl-5-nitroindole followed by the Vilsmeyer reaction has given some 2-methyl-3-formyl-5-nitro-N-alkylindoles, which on reaction with DMF diethyl acetal afford 2-(β-dimethylamino)vinylindoles.Heating the latter with ammonia provided a novel synthesis of γ-carbolines.Condensation of 1,2-dimethyl-3-formyl-5-nitroindole with dimethylacetamide diethyl acetal gave 2-dimethylamino-6-nitro-9-methylcarbazole.
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