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4‑Hydroxybenzaldehyde (para‑hydroxybenzaldehyde) is an organic compound with the formula C 6 H 4 OH(CHO). [4] [5] Along with 2-hydroxybenzaldehyde and 3-hydroxybenzaldehyde, it is one of the three isomers of hydroxybenzaldehyde.
2-Hydroxy-4-methoxybenzaldehyde is a chemical compound and an isomer of vanillin. Urolithin M7 , one of the urolithins , has also been synthesized from 2-hydroxy-4-methoxybenzaldehyde using the inverse electron-demand Diels–Alder reaction .
Salicylaldehyde is produced by condensation of phenol with formaldehyde to give hydroxybenzyl alcohol, which is oxidized to the aldehyde. [4] Salicylaldehydes in general are prepared by ortho-selective formylation reactions from the corresponding phenol, for instance by the Duff reaction, Reimer–Tiemann reaction, or by treatment with paraformaldehyde in the presence of magnesium chloride and ...
Vanillin is an organic compound with the molecular formula C 8 H 8 O 3.It is a phenolic aldehyde.Its functional groups include aldehyde, hydroxyl, and ether.It is the primary component of the extract of the vanilla bean.
Vanillic acid (4-hydroxy-3-methoxybenzoic acid) is a dihydroxybenzoic acid derivative used as a flavoring agent. It is an oxidized form of vanillin. It is also an intermediate in the production of vanillin from ferulic acid. [2] [3]
The chemical is produced by the Reimer-Tiemann reaction on 4-methoxyphenol with a 79% yield. [1] It reacts with malononitrile to form 2-imino-6-methoxy-2H-1-benzopyran-3-carbonitrile. [2] It can be reduced by sodium borohydride in ethanol to form 2-hydroxy-5-methoxybenzyl alcohol. [3]
ortho-Vanillin (2-hydroxy-3-methoxybenzaldehyde) is an organic solid present in the extracts and essential oils of many plants. [1] [2] [3] Its functional groups include aldehyde, ether and phenol. ortho-Vanillin, a compound of the formula C 8 H 8 O 3, is distinctly different from its more prevalent isomer, meta-vanillin.
5-Nitrovanillin (4-hydroxy-3-methoxy-5-nitrobenzaldehyde) is a derivative of vanillin in which the hydrogen ortho- to the hydroxy group is substituted by a nitro group.