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Lithio glycal

Lithio glycal is prepared by direct abstraction of a vinylic proton with butyl lithium or Schlos-ser s base (w-BuLi and t-BuOK). Alternatively, transmetalation of 1-stannyl-glycal with butyl... [Pg.792]

The glycal-tin derivative (138), made from the 1-lithio-compound (Hanessian et al. J. Chem. Soc. Chem. Commuru, 1986, 926), reacts with acyl bromides in the presence of a palladuim catalyst to give 1-acylglycals (139) in addition significant proportions of the C-C linked dimer (140) were formed (Scheme 18). Parallel work was conducted with... [Pg.46]

A different approach to spiroketals of this series is illustrated in Scheme 20. The anthracene derivative (148) was made from the glycal by way of the 1-lithio-derivative and reduced to the 2-deoxy-p-C-glycoside. ... [Pg.47]

See other pages where Lithio glycal is mentioned: [Pg.29]    [Pg.29]    [Pg.793]    [Pg.29]    [Pg.29]    [Pg.793]    [Pg.300]    [Pg.6]    [Pg.32]    [Pg.34]    [Pg.6]    [Pg.32]    [Pg.34]    [Pg.33]    [Pg.43]    [Pg.151]   
See also in sourсe #XX -- [ Pg.792 ]



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1- Lithio glycals by direct lithiation

Glycal

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