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Conjugate alkenylation

Irrespective of the stereochemistry of the ot,p-enones, lithium alkenyltrialkylalanates, e.g. (28) and (29), obtainable by treatment of alkenylalanes with methyllithium (or n-butyllithium), are also excellent 1,4-conjugate alkenyl transfer reagents. The cornerstone of a general prostaglandin synthesis, as exemplified in Scheme 6, employs the alanate conjugate addition process exclusively.13... [Pg.142]

Peyrat, J.-F., Thomas, E., L Hermite, N., Alami, M., Brian, J.-D. Versatile palladium(ll)-catalyzed Negishi coupling reactions with functionalized conjugated alkenyl chlorides. Tetrahedron Lett. 2003,44, 6703-6707. [Pg.638]

The Diels-Alder product exhibits all of the spectral properties of a non-conjugated, alkenyl five-membered anhydride (Fig. 6.29). The macro group frequency train for the anhydride portion of the molecule involves peaks at 1844,1772,998, and 935 cm ... [Pg.264]

Triflic acid catalyses direct conjugate alkenylation of a, -unsaturated ketones with styrenes, with some diastereoselectivity. ... [Pg.43]

See other pages where Conjugate alkenylation is mentioned: [Pg.7]    [Pg.76]    [Pg.213]    [Pg.308]    [Pg.889]    [Pg.93]    [Pg.1205]    [Pg.497]    [Pg.31]    [Pg.1205]    [Pg.935]    [Pg.186]    [Pg.421]    [Pg.1146]    [Pg.935]    [Pg.159]    [Pg.164]    [Pg.170]    [Pg.254]    [Pg.437]    [Pg.136]   


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