Process for preparing 2-hydroxybenzoic aldehydes

Details Process for preparing 2-hydroxybenzoic aldehydes Process for preparing 2-hydroxybenzoic aldehydes

1977-08-12

1979-04-24

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260600R, C07C 4500

Patent

active

041512014

ABSTRACT:
There is disclosed a catalytic process for preparing, from phenols and formaldehyde 2-hydroxybenzoic aldehydes some of which are new in the art and, more particularly, a high-selectivity process for preparing the aldehydes by direct synthesis from phenols having at least a free ortho position and formaldehyde, in the presence of a catalyst consisting of anhydrous stannous and/or stannic chloride and of an aprotic binder.

REFERENCES:
patent: 2903483 (1959-09-01), Berres
patent: 3173956 (1965-03-01), Grinstead
patent: 3271412 (1966-09-01), Raue et al.
patent: 3349115 (1967-10-01), Weil et al.
patent: 3833660 (1974-09-01), Smith
patent: 3838173 (1974-09-01), Royer et al.

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