Reactions of polyhalogenopyridines. 14. Reaction of isomeric dichlorocyanopyridines and pentachloropyridine with potassium ethylxanthate

Abstract

The reactions of isomeric tetrachlorocyanopyridines with potassium ethylxanthate were studied. It was found that tetrachloro-2-cyanopyridine was converted successively into 4-mono- and then 3,4-bisethylxanthate derivatives. In the presence of potassium ethylxanthate the last derivative undergoes intramolecular cyclization with the formation of derivatives of 1,3-dithiolo[4,5-c]pyridine. In the case of other initial polychloropyridines processes involving substitution of the chlorine atoms by the ethylxanthate fragment, sometimes accompanied by the loss of COS molecules, were observed instead of heterocyclization.

How to Cite
Sipyagin, A. M.; Kolchanov, V. V.; Lebedev, A. T.; Karakhanova, N. K. Chem. Heterocycl. Compd. 1997, 33, 1306. [Khim. Geterotsikl. Soedin. 1997, 1510.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF02320333