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3.3- Difluoroallylic ketones

Difluoroallylic ketones readily underwent nucleophilic 5-endo-trig cyclization through the corresponding metal enolates to afford 5-fluorinated 2-alkylidene-2,3-dihydrofurans via intramolecular O-alkenylation... [Pg.216]

Elimination. An improved synthesis of unsaturated pyranosides by elimination of v(c-ditosylates is mediated by Zn-Nal with microwave heating. Under such conditions higher yields and faster rates are observed. Dechlorination of jS-chloro-jS-(chlorodifluoromethyl)vinyl ketones to afford difluoroallyl ketones is effected with assistance of ultrasound. ... [Pg.406]

Indium mediates the coupling of a,a-difluoroallyl carbanion with aldehydes, to give geuz-difluorohomoallyl alcohols.89 hi contrast to many comparable allylations of carbonyl compounds, ketones do not react. [Pg.17]

Difluoroallylation. The reagent reacts with aldehydes, ketones, and esters regio-selectively to give products in which the new C—C bond is formed at the CF, terminus of the allyl system. [Pg.189]

See other pages where 3.3- Difluoroallylic ketones is mentioned: [Pg.734]    [Pg.219]   
See also in sourсe #XX -- [ Pg.216 ]

See also in sourсe #XX -- [ Pg.216 ]



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Difluoroallylation

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