Abstract
Methods for the synthesis of isomeric thienothiophenes by cyclization of methyl γ-thienylmercaptoacetoacetates in polyphosphoric acid (PPA) were developed. It is shown that the acylation of the acetonyl derivaties of isomeric thienothiophenes in an aliphatic acid anhydride—70% perchloric acid system leads to the corresponding pyrylium salts. Some reactions of the latter with nucleophilic reagents were studied. The structures of the substance obtained were confirmed by the IR and PMR spectra.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
L. V. Dulenko, G. N. Dorofeenko, S. N. Baranov, I. G. Kat-ts, and V. I. Dulenko, Khim. Geterotsikl. Soedin., No. 3, 320 (1971).
G. N. Dorofeenko, V. I. Dulenko, and V. I. Volbushko, Khim. Geterotsikl. Soedin., No. 4, 450 (1973).
V. I. Dulenko, S. V. Tolkunov, and N. N. Alekseev, Khim. Geterotsikl. Soedin., No. 10, 1351 (1981).
N. N. Alekseev and S. V. Tolkunov, Khim. Geterotsikl. Soedin., No. 10, 1424 (1979).
Ya. L. Gol'dfarb, V. P. Litvinov, and S. A. Ozolin', Izv. Akad. Nauk SSSR, Ser. Khim., No. 3, 510 (1965).
J. D'Alo, A. Masserini, and J. Bonacina, Bull. Chim. Farm., 103, 709 (1964).
O. Dann and M. Kokorudz, Chem. Ber., 91, 172 (1958).
Author information
Authors and Affiliations
Additional information
Translated from Khimiya Geterotsiklicheskikh Soedinenoi, No. 1, pp. 37–41, January, 1983.
Rights and permissions
About this article
Cite this article
Dulenko, V.I., Tolkunov, S.V. & Alekseev, N.N. Synthesis and reactions of thieno[2′,3′:5,4]thieno [2,3-c]- and thieno[2′,3′:4,5]thieno[2,3-c]pyrylium salts. Chem Heterocycl Compd 19, 32–37 (1983). https://doi.org/10.1007/BF00512810
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00512810