Preparation of glyoxal monoacetals

US6013842A · kind A · utility

Assignee

• BASF SE

Inventors

• Carsten Groning · Mannheim, DE
• Jörg Therre · Worms, DE
• Gerd Kaibel · Lampertheim, DE
• Klaus Ebel · Lampertheim, DE

Key dates

• Filing date: Nov 25, 1997
• Grant date: Jan 11, 2000
• Expiry date: Nov 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/71
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing glyoxal monoacetals of the formula I, ##STR1## where R.sup.1 and R.sup.2, which can be identical or different, are C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl involves reacting a mixture of glyoxal and glyoxal bisacetals of the formula II, ##STR2## where R.sup.1 and R.sup.2 have the meaning given above, with an excess of an alcohol of the formula R.sup.1 OH or R.sup.2 OH or mixtures of these in the presence of an acid catalyst until reaction equilibrium is achieved.