Synthesis of Bis(2amino‐5‐R‐phenyl) Ditellurides.

Abstract

Organo-tellurium compounds S 0140 Synthesis of Bis(2amino-5-R-phenyl) Ditellurides. -[by a novel one-pot procedure using readily accessible and hydrolytically stable N-silylated 2-bromoanilines (I) as starting compounds]. -(ZAKHAROV, A. V.; AVANESYAN, K. V.; SADEKOV, I. D.; MINKIN, V. I.; Russ. J. Org. Chem. 41 (2005) 3, 467-468; Inst. Phys. Org. Chem., Rostov State Univ., Rostov-on-Don 344090, Russia; Eng.) -R. Staver 46-170

Organotellurium Chemistry: Remarkably Facile Preparation of Benzo‐1,3‐tellurazoles

“…Several methods for their preparation have been described, nearly all of which rely on displacing a suitable leaving group by tellurium in the presence of a nitrogen-containing substituent in ortho position (Scheme 1). These include treatment of 2-nitrophenylboronic acid with tellurium tetrachloride [4], the reaction of 2-(N-trimethylsilylamino)phenylmagnesium bromides with elemental tellurium [5], reaction of 2-lithionitrobenzene with benzyltellurocyanate [6], and reaction of 2-acetamidophenylmercury chlorides with tellurium tetrachloride [7]. All of these methods have disadvantages, such as relatively inaccessible starting materials, highly toxic intermediates, or tedious procedures.…”