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Enol silanes, stereogenic Lewis acid mediated

Chiral a-methyl aldehydes (43) show exceptional diastereofacial preferences in their Lewis acid mediated reactions with enol silanes (equation i6) 2i 25c-26-64 selected data are reported in Table 8. The reason for this selectivity may be due to an approach trajectory of the nucleophile closer to the stereocenter when the carbonyl group is bound to the Lewis acid. Additions to chiral a-alkoxy aldehyde (48) were studied with both nonstereogenic (equation 17 Table 9) and stereogenic enol silanes (equation 18 Table 10). (Stereogenic and nonstereogenic are defined according to Mislow and Siegel.) ... [Pg.640]

Table 19 Lewis Acid Mediated Reactions of Stereogenic Enol Silanes with Chiral Azetinones (106) and (111)... Table 19 Lewis Acid Mediated Reactions of Stereogenic Enol Silanes with Chiral Azetinones (106) and (111)...
See other pages where Enol silanes, stereogenic Lewis acid mediated is mentioned: [Pg.648]    [Pg.648]    [Pg.648]    [Pg.84]   
See also in sourсe #XX -- [ Pg.2 , Pg.649 ]

See also in sourсe #XX -- [ Pg.649 ]

See also in sourсe #XX -- [ Pg.649 ]

See also in sourсe #XX -- [ Pg.2 , Pg.649 ]

See also in sourсe #XX -- [ Pg.649 ]



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Enol silanes

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Enol silanes, stereogenic

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Enols acidity

Lewis-acidic silanes

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