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2,4-Dihydroxybenzaldehyde or β-resorcylaldehyde is a phenolic aldehyde, a chemical compound with the formula C 7 H 6 O 3. It is an isomer of protocatechuic aldehyde (3,4-dihydroxybenzaldehyde). References
2,4-Dihydroxybenzoic acid (β-resorcylic acid) is a dihydroxybenzoic acid. As a resorcylic acid, it is one of the three isomeric crystalline acids that are both carboxyl derivatives of resorcinol and dihydroxy derivatives of benzoic acid. [4] Synthesis from resorcinol is via the Kolbe-Schmitt reaction. [5]
Dihydroxybenzaldehyde may refer to: 2,4-Dihydroxybenzaldehyde; 3,4-Dihydroxybenzaldehyde This page was last edited on 26 November 2024, at 04:05 (UTC). Text is ...
All three isomers have the chemical formula C 6 H 6 O 2. Similar to other phenols, the hydroxyl groups on the aromatic ring of a benzenediol are weakly acidic . Each benzenediol can lose an H + from one of the hydroxyls to form a type of phenolate ion.
The modified salicylaldehyde 3,5-di-tert-butylsalicylaldehyde is prepared by the Duff reaction: [4] Duff reaction 3,5-di-tert-butylsalicylaldehyde. The natural product syringaldehyde can also be prepared by the Duff reaction. In this example, formylation occurs at the position para to the phenolic OH. [5]
There are six main compounds, having all the same molecular formula C 7 H 6 O 4. Those are: 2,3-Dihydroxybenzoic acid (2-Pyrocatechuic acid or hypogallic acid) 2,4-Dihydroxybenzoic acid (β-Resorcylic acid) 2,5-Dihydroxybenzoic acid (Gentisic acid) 2,6-Dihydroxybenzoic acid (γ-Resorcylic acid) 3,4-Dihydroxybenzoic acid (Protocatechuic acid)
A possible mechanism is depicted below: [1] proposed mechanism Bobbitt reaction. First the benzaliminoacetal 3 is built by the condensation of benzaldehyde 1 and 2,2-diethylethylamine 2. After the condensation the C=N-double bond in 3 is hydrogenated to form 4. Subsequently, an ethanol is removed. Next, the compound 5 is built including the ...
The Dakin oxidation (or Dakin reaction) is an organic redox reaction in which an ortho- or para-hydroxylated phenyl aldehyde (2-hydroxybenzaldehyde or 4-hydroxybenzaldehyde) or ketone reacts with hydrogen peroxide (H 2 O 2) in base to form a benzenediol and a carboxylate. Overall, the carbonyl group is oxidised, whereas the H 2 O 2 is reduced.