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Tellurium complexes coupling reactions

Alkyl phenyl telluriums and diaryl telluriums react with Grignard reagents in THF or diethyl ether in the presence of catalytic amounts of nickel- or cobalt-phosphane complexes. Tellurium is precipitated. The organic groups combine to form in most cases all three possible coupling products in ratios determined by reaction conditions . The reaction of ( Z,)-phenylethenyl phenyl tellurium and phenyl magnesium bromide formed almost exclusively ( Zj-stilbene in quantitative yield. ( ZJ-Ethoxycarbonylethenyl phenyl tellurium and phenyl magnesium bromide reacted differently ( Fj-ethoxycarbonyl-(phenyl)-ethene and diphenyl tellurium were produced. Tellurium was not formed. ... [Pg.486]

See other pages where Tellurium complexes coupling reactions is mentioned: [Pg.654]    [Pg.165]    [Pg.249]    [Pg.297]    [Pg.96]    [Pg.87]    [Pg.47]    [Pg.86]    [Pg.486]    [Pg.614]    [Pg.618]    [Pg.87]    [Pg.87]    [Pg.182]    [Pg.228]    [Pg.299]   
See also in sourсe #XX -- [ Pg.9 ]



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Complex Coupling

Reactions tellurium

Tellurium complexes

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