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Transmetallation lithium-zinc exchange

The most general route to transition metal enolates involves lithiation of an enolisable substrate followed by transmetallation with a proper metal halide several reports are available in the literature where zinc enolates are prepared via lithium/zinc exchange, and selected examples are discussed henceforth. [Pg.837]

A few modifications of this reaction are the reaction between alkyl iodide and copper-zinc alloy, the reaction between zinc and a mixture of alkyl iodide and alkyl bromide, the transmetalation between zinc and lithium, magnesium, or tin, and the iodine-zinc exchange. ... [Pg.1117]

Alkynyllead triacetates can be prepared by tin-lead or by mercury-lead exchange.88,8811 However, more convenient methods were subsequently devised. In situ transmetallation can be directly realized by lithium-lead or zinc-lead exchange. This avoids the isolation of unstable alkynylmetal derivatives. Ikegami et al. found that, if a THF solution of... [Pg.402]

See other pages where Transmetallation lithium-zinc exchange is mentioned: [Pg.136]    [Pg.279]    [Pg.252]    [Pg.105]    [Pg.202]    [Pg.7]    [Pg.102]    [Pg.532]    [Pg.252]    [Pg.207]    [Pg.390]    [Pg.1116]    [Pg.283]    [Pg.91]    [Pg.389]    [Pg.293]    [Pg.297]    [Pg.303]    [Pg.874]    [Pg.389]    [Pg.1377]    [Pg.403]    [Pg.1377]    [Pg.302]    [Pg.29]    [Pg.257]    [Pg.261]   
See also in sourсe #XX -- [ Pg.9 , Pg.87 ]



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