CA Patent

CA1255327A — Process for producing acyloxy aromatic carboxylic acid

Assigned to Celanese Corp · Expires 1989-06-06 · 37y expired

What this patent protects

ABSTRACT OF THE DISCLOSURE Acyloxy aromatic carboxylic acids, e.g., 4-acetoxybenzoic acid, are prepared by oxidizing with oxygen an acyloxy aromatic ketone, e.g., 4-acetoxyacetophenone in the presence of transition metal ions as catalyst and a co-reductant. The acyloxy aromatic k…

USPTO Abstract

ABSTRACT OF THE DISCLOSURE Acyloxy aromatic carboxylic acids, e.g., 4-acetoxybenzoic acid, are prepared by oxidizing with oxygen an acyloxy aromatic ketone, e.g., 4-acetoxyacetophenone in the presence of transition metal ions as catalyst and a co-reductant. The acyloxy aromatic ketone may be prepared by acylating a hydroxy aromatic ketone, e.g., 4-hydroxyacetophenone, which has the effect of "masking" the hydroxyl group of the ketone in a manner necessary to effect the subsequent transition-metal catalyzed oxidation of the ketone to the acyloxy aromatic carboxyic acid.

Drugs covered by this patent

Patent Metadata

Patent number
CA1255327A
Jurisdiction
CA
Classification
—
Expires
1989-06-06
Drug substance claim
No
Drug product claim
No
Assignee
Celanese Corp
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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