Process for the preparation of 2-methoxymethy1-1,4-benzenediamine, its derivatives thereof and the salts thereof

US8592631B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• John Michael Gardlik · Cincinnati, US
• Garry Steven Garrett · Lancaster, US
• Bryan Patrick Murphy · Loveland, US
• John Michael Janusz · Cincinnati, US
• John August Wos · Cincinnati, US

Key dates

• Filing date: Jan 28, 2011
• Grant date: Nov 26, 2013
• Expiry date: Feb 19, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for synthesizing 2-methoxymethyl-1,4-benzenediamine, its derivatives of formula (IV) and the salts thereof, which comprises a reductive amination step. The preferred final product is 2-methoxymethyl-1,4-benzenediamine of formula (IV-a).These compounds may be used as primary intermediates in compositions for dyeing keratin fibers.