Abstract
A number of substituted tetrahydroquinolines were dehydrogenated for the first time to the corresponding quinoline derivatives by means of chloranil and a cupric chloride-pyridine complex. It is shown that the tendency for dehydrogenation decreases on passing from 6-formyl- to 6-bromo-, 6-nitro-, and 7-nitrotetrahydroquinolines. The nitration of N-acyltetrahydroquinolines (where the acyl group is formyl, acetyl, or benzoyl) was studied in detail. The possible formation of a 7-nitro isomer in addition to a 6-nitro isomer was demonstrated, and conditions which make it possible to vary the ratio of the yields of these isomers were found.
Similar content being viewed by others
Literature cited
A. P. Terent'ev and M. N. Preobrazhenskaya, Zh. Obsch. Khim., 118, 302 (1958).
A. N. Kost, L. D. Pertsev, L. G. Yudin, and S. F. Kalinkin, Zh. Prikl. Khim., 32, 2349 (1959).
L. G. Yudin, A. N. Kost, and E. Kh. Zolotarev, Vestnik MGU, Ser. Khim., No. 2, 169 (1958).
V. Dorp, Rec. Trav. Chim., 23, 307 (1904).
A. Rugin and F. Morard, Helv. Chim. Acta. 35, 2322 (1952).
Z. Hoffman and W. Königs, Ber., 16, 727 (1883).
N. Roh, German Patent No. 660, 693 (1938); Chem. Abstr., 32, 7056 (1938).
I. Braun, A. Grabowsky, and M. Rawicz, Ber., 46, 3169 (1913).
N. Kulka and R. Manske, Can. J. Chem., 30, 720 (1952).
A. Pichtet and R. Bunzl, Ber., 22, 1848 (1889).
A. H. Cook, I. M. Heilbron, and L. Steger, J. Chem. Soc., 413 (1943).
A. Claus and V. Tornier, Ber., 20, 2874 (1887).
Z. Haskelberg, J. Org. Chem., 12, 434 (1947).
Z. Bradford, T. Elliot, and F. Rowe, J. Chem. Soc., 437 (1947).
K. Nelson, J. Org. Chem., 21, 145 (1956).
Author information
Authors and Affiliations
Additional information
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1663–1666, December, 1970.
Rights and permissions
About this article
Cite this article
Terent'ev, A.P., Il'ina, I.G., Yudin, L.G. et al. Quinoline derivatives. Chem Heterocycl Compd 6, 1553–1556 (1970). https://doi.org/10.1007/BF00522580
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00522580