4-Hydroxybenzaldehyde
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| Template:Longitem | Template:Chembox Elements/molecular formula |
| Molar mass | Template:Chem molar mass |
| Appearance | yellow to tan powder |
| Density | 1.129 g/cm3 (130 °C)[1] |
| Melting point | Template:Chembox CalcTemperatures |
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| Acidity (pKa) | 7.61 (25 °C)[3] |
| Template:Longitem | −78.0·10−6 cm3/mol |
| Template:Longitem | 1.57051 (130 °C)[1] |
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4Template:NbhHydroxybenzaldehyde (paraTemplate:Nbhhydroxybenzaldehyde) is an organic compound with the formula Template:Chem2.[4][5] Along with 2-hydroxybenzaldehyde and 3-hydroxybenzaldehyde, it is one of the three isomers of hydroxybenzaldehyde.
Synthesis, reactions, uses
4-Hydroxybenzaldehyde is prepared by reaction of phenol with chloroform, which gives isomeric hydroxybenzal chlorides. Hydrolysis of the C-Cl bonds gives the aldehyde.[5]
4-Hydroxybenzaldehyde is a precursor to 4-hydroxyphenylglycine, a precursor to penicillins. In the Dakin oxidation, 4-hydroxybenzaldehyde reacts with hydrogen peroxide in base to form hydroquinone.
Metabolism and occurrence
p-Hydroxybenzaldehyde dehydrogenase is an enzyme found in carrots (Daucus carota).[6]
4-Hydroxybenzaldehyde is found in the orchids Gastrodia elata,[7] Galeola faberi,[8] and the Vanilla orchids.
See also
- Salicylaldehyde (2-hydroxybenzaldehyde)
References
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Cited sources
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