INDOLOPYRIDINES WITH AN ANGULAR HETEROATOM. 11. SYNTHESIS OF 12-ARYLIDENINDOLO[2,1-<i>a</i>]ISOQUINOLINIUM SALTS

Abstract

The condensation of aromatic aldehydes with indolo[2,1-a]isoquinoline in a solution of trifluoroacetic acid yielded a series of 12-arylidenindolo[2,1-a]isoquinolinium trifluoroacetates. Analogous quaternary salts are formed with trichloroacetic and acetic acids as well as upon the reaction of indoloisoquinolinium hydrochloride with p-nitrobenzaldehyde or with p-nitrophenyldiazonium chloride in ethanol.

Authors: A. T. Soldatenkov, Zh. Ntaganda, S. A. Soldatova, Kh. A. R. Alarkon, B. N. Anisimov, and N. I. Golovtsov.

English Translation in Chemistry of Heterocyclic Compounds, 1999, 35 (6), pp 699-702

http://link.springer.com/article/10.1007/BF02251629