Process for preparing protocatechualdehyde and its derivatives

Details Process for preparing protocatechualdehyde and its derivatives Process for preparing protocatechualdehyde and its derivatives

1978-01-16

1979-08-21

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260600A, 562470, C07C 4518

Patent

active

041653416

ABSTRACT:
A process for preparing protocatechualdehyde or a 3-alkoxy-4-hydroxybenzaldehyde which comprises subjecting catechol or a 2-alkoxyphenol to reaction with glyoxylic acid in a basic aqueous medium in the presence of a catalyst containing one or more compounds selected from aluminium oxide, silicon oxide and hydrated aluminium oxide in an amount of not less than 0.01 g per 1 g of the starting catechol or 2-alkoxyphenol at a temperature of 0.degree. to 50.degree. C., and then oxidizing the thus obtained reaction mixture in a basic medium.

REFERENCES:
patent: 2062205 (1936-11-01), Boedecker
patent: 2199748 (1940-05-01), Mather et al.

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