CA Patent

CA2475141A1 — Process for the synthesis of n-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids

Assigned to Wyeth LLC · Expires 2003-08-14 · 23y expired

What this patent protects

The invention claimed herein provides a process to oxidize N- (5-alkoxy-2- methyl-4-nitrophenyl) acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.

USPTO Abstract

The invention claimed herein provides a process to oxidize N- (5-alkoxy-2- methyl-4-nitrophenyl) acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.

Drugs covered by this patent

Patent Metadata

Patent number
CA2475141A1
Jurisdiction
CA
Classification
—
Expires
2003-08-14
Drug substance claim
No
Drug product claim
No
Assignee
Wyeth LLC
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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