Trialkylaluminium, aldehyde

Scheme 3. Reactions of ketones and aldehydes with trialkylaluminium...

An enantioselective addition of trialkylaluminium to aldehydes uses chiral a-hydroxy acids as ligands.252... [Pg.27]

The first examples of the enantioselective titanium-mediated trialkylaluminium additions to aromatic and aliphatic aldehydes catalysed by optically active -hydroxy... [Pg.268]

Exceptionally bulky methylaluminium bis(4-bromo-2,6-di-rerf-butyl)phenoxide is a useful catalyst in producing high stereoselectivity in the cycloaddition of trialkylsilylketene with aldehydes to give cis-3,4-disubstituted-2-oxetanones (95T4011). The complex formed from a trialkylaluminium and the chiral bissulfonamide (31)... [Pg.70]

The Claisen rearrangement of aliphatic allyl vinyl ethers, when promoted by trialkylaluminium compounds, provides a route to -alkenyl alcohols (Scheme 26) by uptake of a nucleophile on the aldehydic carbon produced. 6,e-Alkynyl alcohols are available from sterically guided 1,4-addition of lithium acetylides to propenyl trityl ketone followed by reductive cleavage of the trityl group. ... [Pg.169]

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