Process for the preparation of substituted hydroxyhydrocinnamate esters

US5892097A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• John R. Ross · Stanford, US
• Michael Schultz · Mannheim, DE
• Benoit Dubuis · Muttenz, CH
• Peter Kung · Jona, CH

Key dates

• Filing date: May 22, 1997
• Grant date: Apr 6, 1999
• Expiry date: May 22, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/03
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The transesterification of substituted lower alkyl hydroxyhydrocinnamates with a higher alcohol or a polyol is greatly facilitated by the use of a trace amount of a tin catalyst. In many cases, the amount of the catalyst is so small that it is unnecessary to remove it from the final product by distillation of said product.