Chemistry of Heterocyclic Compounds p. 921 - 925 (1980)
Update date:2022-08-03
Topics:
Kost, A. N.
Yurovskaya, M. A.
Vyazgin, A. S.
Afanas'ev, A. Z.
A method for the alkylation of 3-unsubstituted indoles by means of 1-(ω-haloalkyl)-pyridinium salts via the Friedel-Crafts reaction with the aid of complex catalysts, viz., complexes of zinc, tin, and titanium chlorides with pyridine, was developed.On the basis of a study of the electronic spectra of the resulting 1-(3-indolyl-alkyl)pyridinium salts it was shown that they are molecular self-complexes.The stabilities of the molecular self-complexes were investigated as a function of the length of the alkyl chain and the character of the substituents in the indole ring.
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