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ChemicalBook CAS DataBase List Isovanillin
621-59-0

Isovanillin synthesis

14synthesis methods
Synthesis of isovanillin: 4-Hydroxybenzaldehyde is used as raw material, firstly react with bromine to obtain 3-bromo-4-hydroxybenzaldehyde, then react with methyl iodide to obtain 3-bromo-4-methoxybenzaldehyde, and then hydrolyzed under the action of sodium hydroxide and cuprous chloride to produce isovanillin. The yield was 64.1%.
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Yield:621-59-0 97.2%

Reaction Conditions:

with water at 65; for 3 h;Large scale;Reagent/catalyst;Time;

Steps:

1.2; 2.2

(2) Add 728kg of intermediates, 150kg of SO42-/ZrO2-TiO2 catalyst, and 1500kg of water to the reactor, and react at 65°C for 3 hours to complete the reaction. Press filter the reaction solution, dissolve the filter cake with 2000kg ethanol, keep stirring at 60°C for 4h; press filter, transfer the filtrate to the crystallization kettle, lower the temperature to 0°C, keep stirring for 4h; Press filtration to obtain 631.23 kg of wet product, the filtrate is transferred to a rectification device, and the obtained solid is vacuum dried to a constant weight to obtain 593.21 kg of isovanillin.

References:

CN113185391,2021,A Location in patent:Paragraph 0019; 0031-0039; 0041-0051

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