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Allylic substitution organocatalysts

Shi et al7 reported a highly enantioselective allylic substitution of Morita-Baylis-Hillman (MBH) acetate with TMSOF that could be achieved by chiral prolinamide phosphane organocatalysts 43 in good yield and high ee. [Pg.131]

Morita-Baylis-Hillmann carbonates were involved in an asymmetric allylic substitution reaction with diphenylphosphine oxide in the presence of chiral thiourea-phosphine organocatalysts. The enantioselectivity was > 96% (Scheme 28). ... [Pg.62]

High yields of 2-substituted chromans are readily attained from the asymmetric intramolecular oxa-Michael addition reaction of phenols bearing an (f -a,P-unsaturated ketone or thioester moiety mediated by a cinchona-alkaloid-urea-based bifunctional organocatalyst (140BC119). Molecular iodine-catalyzed reaction of phenols with a,P-unsaturated alcohols affords a wide range of 2,2-disubstituted chromans (14T5221). Chiral derivatives result from the intramolecular allylic alkylation of phenols bearing an... [Pg.482]

See other pages where Allylic substitution organocatalysts is mentioned: [Pg.142]    [Pg.309]    [Pg.208]    [Pg.208]    [Pg.265]    [Pg.147]    [Pg.168]    [Pg.169]    [Pg.791]    [Pg.90]    [Pg.474]    [Pg.402]    [Pg.46]    [Pg.102]   


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Allylic substitution

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