Process for preparing 2-halogenated indan-1-ones

US6433228B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Joachim Komoschinski · Neunburg vorm Wald, DE
• Helmut Fiege · Leverkusen, DE
• Guido Steffan · Odenthal, DE
• Klaus-Christian Paetz · Burscheid, DE

Key dates

• Filing date: Feb 18, 2000
• Grant date: Aug 13, 2002
• Expiry date: Feb 18, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Halogenoindan-1-ones are prepared in an advantageous manner by converting anilines into diazonium salts and these, with acrylic compounds, into 3-phenyl-1-halogenoproprionic acid derivatives, and latter are cyclized.