Process for preparing substituted pyridines

US6392050B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Norbert Lui · Odenthal, DE
• Hans Panskus · Leverkusen, DE
• Albert Schnatterer · Leverkusen, DE

Key dates

• Filing date: Jun 4, 2001
• Grant date: May 21, 2002
• Expiry date: Jun 4, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/80
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing substituted pyridines in a simple and cost-effective manner in good yields by reacting substituted 1,4-dihydropyridines with methyl nitrite in the presence of an acid that contains less than 20% by weight of oxidizing components.