Regiospecific Cyclization of 3-Carbomethoxyindole-1-propanoic Acid onto 7-Position of the Indole Nucleus

Abstract
Intramolecular cyclization of 3-carbomethoxyindole-1-propanoic acid (3) occurred not onto 2-position but onto 7-position to afford pyrrolo[3,2,1-ij]quinoline derivative 5.
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