B. B. Rivkin

Synthesis and Reactions of Diorganyl Tellurides

Abstract Literature data concerning the synthesis and reactions of diorganyl tellurides, viz., dialkyl, alkyl aryl and diaryl tellurides are systematized and generalized in this review.

Synthesis and reactions of benzo-1,3-dichalcogenoles and their derivatives

Abstract A comprehensive up-to-date review of the synthesis and reactions of benzo-1,3-dithioles, benzo-1,3-diselenoles and benzo-1,3-ditelluroles is presented. An appreciable synthetic potential of these chalcogen-containing heterocycles for the preparation of dibenzotetrachalcogenafulvalenes, particularly carbonyl compounds and hydrocarbons, is displayed.

SYNTHESIS, REACTIONS, AND STRUCTURES OF 1,3- AND 1,2-DITELLUROLES (REVIEW)

Data on methods for the synthesis of 1,3- and 1,2-di-telluroles and tetratellurofulvalenes and their reactions and structures are systematized and correlated.

5H-1,2-oxatelluroles and their benzo analogs: Synthesis and reactions

Tetracoordinated derivatives of 2-halo-2-aryl-5H-1.2-oxatelluroles and 1-halo-l-butyl-3H-benz-2.1-oxatelluroles were synthesized by the oxidation of 3-aryltelluro-2 propen-l-ols and the dehydrogenation of 2-butyldihalotellurobenzyl alcohols. The halogen atoms in these compounds are readily replaced in nucleophilic substitution reactions. The reaction of benzoxatelluroles with bromine is accompanied by cleavage of O-Te bonds and leads, depending on the nature of the substituent at C(3), to 2-(butylbromotelluro)benzaldehyde or 2-(butyldibromotelluro)benzophenone.

Benzo-1,3-ditellurolium tetrafluoroborate

Interaction of disodiumo-benzeneditellurolate with butyl dichloromethyl ether gave 2-butoxybenzo-l,3-ditellurole. Treatment of the latter with HBF4 in acetic anhydride afforded benzo-1,3-ditellurolium tetrafluoroborate.

A new approach to the synthesis of telluranthene

A series of new methods of synthesizing telluranthrene are proposed, based on the use of poly(o-phenylene)ditelluride and its precursors. The best yields of telluranthene are obtained by the reactions of the disodium salt of o-ditellurolobenzene with o-diiodobenzene (50–62%) and of poly(o-phenylene)ditelluride with butyllithium.

Synthesis of phenoxatellurine derivatives

The reaction of dimedon enol acetate with tellurium tetrachloride gives derivatives of octahydrophenoxatellurine. The reaction of cyclohexanone enol acetate and methyl ethyl ketone with tellurium tetrachloride or aryltellurium trichloride gives the respective organotellurium trichloride and diorganotellurium dichloride.