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Vinyllithium, preparation from vinyltin

Vinyllithiums cf. 13, 142).10 An improved route to vinyllithiums involves coupling of vinyl and aryl triflates with tributyl- or trimethylstannylcuprates of the formula (R3Sn)2Cu(CN)Li2, prepared from LDA, R,SnH, and CuCN in THF at -50° to -60°. The higher-order cuprates couple with vinyl and aryl triflates at -20° to provide a vinyltin intermediate. Work-up of the intermediate with AgOAc provides a vinyltin, with bromine a vinyl bromide, or with CF,COOH an aryltin. [Pg.225]

See other pages where Vinyllithium, preparation from vinyltin is mentioned: [Pg.124]    [Pg.60]    [Pg.63]    [Pg.60]    [Pg.124]    [Pg.60]    [Pg.63]    [Pg.60]   


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