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Carboxylate anions thermolysis

Homologated (E)-unsaturated carboxylic acids The anion (2) of 1, formed with LDA in THF at — 50°, is alkylated exclusively at the /-position. The products (3) are converted into a,/S-unsaturated acids (4) on oxidation and thermolysis. This behavior contrasts with that of the anion of the corresponding silyl enol ether, CH3SCH2CH=C(CN)OSi(CH3)3, which undergoes exclusively a-alkylation.2... [Pg.93]

A first preparation of cumulene (buta-2,3,4-triene)-carboxylic acids (50) features condensations between the anion (49) and ketones or a-keto-esters, the latter electrophiles leading to cumulene diacids (Scheme 8)Thermolysis of these acids can be used to prepare [4]radialenes. [Pg.84]

See other pages where Carboxylate anions thermolysis is mentioned: [Pg.198]    [Pg.191]    [Pg.436]    [Pg.81]    [Pg.1429]    [Pg.488]    [Pg.32]    [Pg.43]    [Pg.85]    [Pg.436]    [Pg.185]    [Pg.340]    [Pg.30]    [Pg.76]    [Pg.142]   
See also in sourсe #XX -- [ Pg.575 ]



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Carboxylate anions

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