Process for the preparation of aromatic hydroxy compounds

Details Process for the preparation of aromatic hydroxy compounds Process for the preparation of aromatic hydroxy compounds

1985-05-22

1987-04-14

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260396R, 260381, 568716, C07C 5018, C07C 5012, C07C 3904

Patent

active

046577076

ABSTRACT:
The invention relates to a process for the preparation of aromatic hydroxy compounds, starting from the corresponding halogenated aromatic compounds and replacing the halogen atom or atoms by the hydroxyl group. The process comprises converting the halogenated aromatic compound into the hydroxy compound by treatment with concentrated sulfuric acid, with the addition of an aldehyde and at elevated temperature.
The aromatic hydroxy compounds are used as intermediates, for example for the manufacture of disperse and vat dyes.

REFERENCES:
patent: 3031466 (1962-04-01), Budziarek et al.
patent: 3562299 (1971-02-01), Harvey
patent: 3636008 (1972-01-01), Yamada et al.
patent: 3821262 (1974-06-01), Schoenauber et al.
patent: 3880892 (1975-04-01), Hiller et al.
patent: 4292247 (1981-09-01), Nishikuri et al.
Japanese Application 26,831/65 Abstract (Derwent Jap. Pat. Rep., vol. 4, No. 47, 28.12.65).

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