Nitro compound-reducing process

US6054617A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Helmut Bahrmann · Hamminkeln, DE
• Boy Cornils · Dinslaken, DE
• Andreas Dierdorf · Frankfurt, DE
• Steffen Haber · Landau, DE

Key dates

• Filing date: May 22, 1998
• Grant date: Apr 25, 2000
• Expiry date: May 22, 2018

Classification

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

Abstract

The invention concerns a process for the reduction of nitro groups to amino groups, characterized that a nitro compound is reacted with hydrogen in the presence of an aqueous solution of a water-soluble metal catalyst of the formula M (L).sub.n (Y).sub.m wherein M is ruthenium, rhodium, nickel, or palladium; L, is a water soluble ligand; Y is a further ligand or an alkaline earth ion; n is 1, 2, 3, or 4; and m is 0, 1, or 2.