Nitrogen-tellurium heterocycles

Several 2-substituted benzotellurazoles have been prepared by the reaction of N-allyl derivatives of o-methyltelluroaniline with POC1₃ or SOC1₂ followed by reduction of the -telluranes which are formed. The use of the zinc and sodium salts of o-aminotellurophenol and 2-chlorotellurenylazobenzene, in a procedure similar to that used to prepare benzothiazoles and benzoselenazoles, did not lead to the formation of benzotellurazoles.For Communication 1, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 120–125, January, 1989.     

Benzo[b]tellurophene, Dibenzo[b,d]tellurophene, and Their Derivatives. (Review)

Data on the synthesis, reactions, crystal structure, and spectral characteristics of benzo[b]tellurophene, dibenzo[b,d]tellurophene, and their derivatives are reviewed and analyzed.     

Reactions of immonium and telluronium salts of 2-phenylbenzotellurazole

N-methyl-2-phenylbenzotellurazolinium iodide, like other N-methylbenzochalcogenazolium salts, readily undergoes reduction, hydrolysis, and recyclization with hydrazine hydrate and o-phenylene diamine. 1-Methyl-2-phenylbenzotelluronioazole perchlorate is an effective methylating agent in reactions with nucleophiles. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, 1268–1272, August, 2007.     

Nitrogen-tellurium heterocycles

Cyclization of previously isolated and purified N-acyl derivatives of -methyltelluroaniline under the influence of POCl₃ leads to 2-R-benzotellurazoles in yields of 35–65%. 1,1-Dichloro-2-R-benzotellurazoles are intermediates in this reaction.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 276–278, February, 1988.     

Nitrogen-tellurium-containing heterocycles. 3. Reaction of 2-phenylbenzotellurazole at the heteroatoms

Reactions of 2-phenylbenzotellurazole at both heteroatoms are studied. -Telluranes and molecular complexes with mercury and palladium salts are prepared. Exchange of a tellurium atom by sulfur is achieved. Alkylation of a heteroatom of the pyrrole type, the tellurium atom, is achieved in a series of benzazoles for the first time.For Communication 2, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 989–993, July, 1989.