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Ethers, vinyl with sulfuric acid

The pyranocoumarin 105 can be prepared via a three-component Diels-Alder reaction between 4-hydroxycoumarin, ethyl vinyl ether and an a-dicarbonyl compound. Similarly to the above, upon treatment of 105 with sulfuric acid in THF, hydrolysis and rearrangement occur to give the furofurochromenone 106. The hemiacetal functionality in 106 may then be oxidized with pyridinium chlorochromate (PCC) to give the lactone 107 <2001EJ03711> (Scheme 28). [Pg.791]

Poly(iso-butyl vinyl ether)-furfural condensate obtained through the condensation of furfural with poly(iso-butyl vinyl ether) in benzene medium in presence of hydrochloric acid at 50 °C on treatment with sulfuric acid yields a carboxylic acid cation-exchange resin with a capacity of 5.8 meq/g. [Pg.88]

See other pages where Ethers, vinyl with sulfuric acid is mentioned: [Pg.427]    [Pg.352]    [Pg.864]    [Pg.118]    [Pg.119]    [Pg.128]    [Pg.129]    [Pg.213]    [Pg.219]    [Pg.239]    [Pg.244]    [Pg.244]    [Pg.250]    [Pg.259]    [Pg.265]    [Pg.267]    [Pg.267]    [Pg.268]    [Pg.270]    [Pg.271]    [Pg.376]    [Pg.381]    [Pg.382]    [Pg.383]    [Pg.487]    [Pg.488]    [Pg.491]    [Pg.588]    [Pg.774]    [Pg.779]    [Pg.860]    [Pg.861]    [Pg.863]    [Pg.974]    [Pg.979]    [Pg.1032]    [Pg.1071]    [Pg.1071]    [Pg.1072]    [Pg.1072]    [Pg.29]    [Pg.29]    [Pg.113]    [Pg.115]    [Pg.308]    [Pg.308]    [Pg.318]    [Pg.320]   
See also in sourсe #XX -- [ Pg.523 ]



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Ether Acids

Ether sulfurous

Ethers, acidity

Sulfuric Ether

Vinyl ethers, acidity

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