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Protocatechuic acid Methyl ether

The monomethyl and dimethyl ethers of protocatechuic acid (XL) are metabolized in entirely different manners by the rabbit, presumably because vanillic acid contains a free hydroxyl group whereas in veratric acid (3,4-dimethoxybenzoic acid) (XLII) this hydroxyl is blocked by a methyl group. Vanillic acid conjugates through the phenolic hydroxyl while veratric acid conjugation is confined to the carboxyl group at the opposite end of the molecule. Sammons and Williams (372) found that 41 per cent of... [Pg.50]

Methyl-protocatechuic aldehyde—Vanillin— CbH s(OH)(OCHs> COH—is the odoriferous, principle of vanilla. It is produced artificially by oxidation of ooniferin, CigHi,Oe, a glucosid occurring in coniferous plants. It crystallizes in needles, fuses at 80 (170° F.) is sparingly soluble in water, readily soluble in alcohol or ether. It has a pungent taste, and a faint odor of vanilla, the latter more marked, when the substance is heated. On exposure to air it becomes partially oxidized to vanillic acid CsHsO<. [Pg.413]

See other pages where Protocatechuic acid Methyl ether is mentioned: [Pg.200]    [Pg.374]    [Pg.64]    [Pg.453]    [Pg.252]    [Pg.4662]    [Pg.836]    [Pg.190]    [Pg.199]    [Pg.507]    [Pg.429]   
See also in sourсe #XX -- [ Pg.661 ]



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3,4-Protocatechuate

Ether Acids

Ethers, acidity

Protocatechuic

Protocatechuic acid

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