Novel aromatic o-hydroxyaldehydes, a process for their preparati

Details Novel aromatic o-hydroxyaldehydes, a process for their preparati Novel aromatic o-hydroxyaldehydes, a process for their preparati

1975-07-22

1977-01-11

Rollins, Alton B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260251Q, 260281N, 260281NH, 260281S, 2603435, 2602472A, 260520D, 260282, 260268TR, 106288Q, 25230126, 424267, C07D21724

Patent

active

040026302

ABSTRACT:
Novel aromatic o-hydro-aldehydes of the formula ##STR1## have been found wherein each X is a carboxy group or both X together are a group of the formula ##STR2## wherein R stands for hydrogen, an optionally substituted amino group, optionally etherified hydroxy group, an optionally substituted aliphatic, cycloaliphatic, aromatic or heterocyclic radical, and A for an optionally substituted phenylene or naphthylene radical. They are valuable intermediate products for the preparation of dyestuffs, optical brighteners, textile auxiliaries and pharmaceutica and are particularly suitable for the preparation of azo-methine dyestuffs which are obtained by condensation of these aldehydes with suitable amines.

REFERENCES:
karpukhin et al., Chem. Abs. 71, 30275b (1969).

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