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Tiffeneau-Demjanow Rearrangements

Pinacol and related rearrangements (Tiffeneau-Demjanow rearrangement, see Scheme II/5)... [Pg.6]

Additions to Ketones. The addition of diazomethane to ketones is also a preparatively useful method for one-carbon homologation. This reaction is a one-step alternative to the Tiffeneau-Demjanow rearrangement and proceeds by the mechanism shown in eq 34. It can lead to either homologation or epox-idation depending on the substrate and reaction conditions. The addition of Lewis acids, such as BF3 etherate, or alcoholic cosolvents tend to favor formation of the homologation products over epoxidation. [Pg.121]

See other pages where Tiffeneau-Demjanow Rearrangements is mentioned: [Pg.9]    [Pg.9]    [Pg.149]    [Pg.9]    [Pg.9]    [Pg.149]    [Pg.400]   
See also in sourсe #XX -- [ Pg.6 , Pg.9 , Pg.10 , Pg.11 , Pg.12 , Pg.13 , Pg.14 , Pg.15 ]



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