Phenyl tellurenyl bromide

Tellurophosphoranes, obtained through a transylidation reaction between tellurenyl halides and phosphoranes, react with aldehydes to give the expected vinylic tellurides as an E Z isomeric mixture (method a). One other methodology involves the treatment of equimolar amounts of phenyl tellurenyl bromide and phosphonium salts with t-BuOK followed by an aldehyde (method b). Under these lithium-salt-free conditions, (Z)-vinylic tellurides are the main products. ... 

The 4-0X0-477-1-benzoteUurins have also been prepared by the cyclization of 2-(3-dimethylamino propenoyl)-phenyl tellurenyl bromide by heating with hypophosphorous acid in pyridine. ... 

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See also in sourсe #XX -- [ ]

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