Tellurides, dialkynyl

Dialkynyl tellurides are obtained in moderate yield by the one-pot reaction of TeCU with LiN(SiMc3)2, followed by the addition of a... 

Dialkynyl tellurides are obtained in moderate yield by the one-pot reaction of TeCl4 with LiN(SiMe3)2, followed by the addition of a terminal acetylene. Alkenyl tellurium(II) derivatives may also be prepared by the addition of arenetellurenamides or Te[N(SiMe3)2]2 to the C = C bond of dimethylacet-ylene dicarboxylate.180... 

The reaction between dialkynyl(organo)phosphine oxides and disodium telluride in dimethylformamide/water produced 2,6-dialky l-4-organo-4-oxo-4//-1,4-telluraphos-phorins2. 

Dialkynyl sulfides combined with disodium telluride in mcthanol/ammonia to form 1,4-thiatellurins7,8. 

Dialkynyl sulfones reacted rapidly with disodium telluride in methanol to produce 3,5-dialkyl-l,4-thiatellurin 1,1-dioxides3. 

In strict correlation with the early method for the preparation of symmetrical diaryl tellurides by treatment of tellurium(IV) halides with 4 mol equiv of aryl Grignard reagent (see Section 3.1.2.4), dialkynyl tellurides are prepared starting from bromomagnesium and lithium acetylenic derivatives. ... 

These species, which provide Te + electrophiles, react with alkynyllithium reagents, giving dialkynyl tellurides in moderate yields. ... 

A general route to 1,4-dichalogenines (51) involves the cyclization of dialkynyl sulfides, selenides, or tellurides, with either sodium selenide or sodium telluride (Equation (9)). It is also possible to... 

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