Process for preparing 2-cycloalkenones

US6011182A · kind A · utility

Assignee

• BASF SE

Inventors

• Matthias Eiermann · Schifferstadt, DE
• Klaus Ebel · Lampertheim, DE
• Jörg Botzem · Schifferstadt, DE

Key dates

• Filing date: Feb 1, 1999
• Grant date: Jan 4, 2000
• Expiry date: Feb 1, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/66
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing 2-cyclo-alkenones of the formula I ##STR1## which comprises subjecting a 2-alkoxycycloalkanone and/or a 2-hydroxyalkanone ketal, in which n is an integer from 0 to 20, m is 0, 1, 2 or 3 and R is alkyl, alkylaryl, aryl, arylalkyl, alkenyl or alkynyl, to an elimination reaction in the gas phase on an acidic heterogeneous catalyst.