Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine

US6162917A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Guido Steffan · Odenthal, DE
• Georg Hardenbicker · Wipperfürth, DE

Key dates

• Filing date: Dec 7, 1998
• Grant date: Dec 19, 2000
• Expiry date: Dec 7, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C255/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine starting from 3-dimethylamino-propionitrile, to its use and also to a crystalline intermediate product form.