EP Patent

EP0856508A1 — Processes for the preparation of arylamines

Assigned to Xerox Corp · Expires 1998-08-05 · 28y expired

What this patent protects

A process for the preparation of N,N-bis(3,4-dimethylphenyl)4-biphenylamine which comprises the reaction of N,N-bis(3,4-dimethylphenyl)amine and an iodobiphenyl in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentat…

USPTO Abstract

A process for the preparation of N,N-bis(3,4-dimethylphenyl)4-biphenylamine which comprises the reaction of N,N-bis(3,4-dimethylphenyl)amine and an iodobiphenyl in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentate tertiary amines and bidentate tertiary amines, and which reaction is preferably accomplished at a temperature of from about 120°C to about 150°C.

Drugs covered by this patent

Patent Metadata

Patent number
EP0856508A1
Jurisdiction
EP
Classification
—
Expires
1998-08-05
Drug substance claim
No
Drug product claim
No
Assignee
Xerox 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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