Patent · US Expired

Process for preparing substituted 2-cyanocinnamic esters

US5451694A · kind A · utility

7Cited by

3References

3Claims

0Family size

Assignee

Haarmann & Reimer Corporation · DE

Inventors

Walter Kuhn · Holzminden, DE
Werner Marks · Bodenwerder, DE
Thomas Thielmann · Holzminden, DE
Erich Dilk · Holzminden, DE

Key dates

Filing date	Apr 22, 1994
Grant date	Sep 19, 1995
Priority date	—
Expiry date	Apr 22, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C253/30
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In the preparation of substituted 2-cyanocinnamic esters by the Knoevenagel condensation of cyanoacetic esters and carbonyl compounds, the reaction times for obtaining high yields can be considerably reduced by using C.sub.3 -C.sub.6 -monocarboxylic acids and ammonium compounds as catalysts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.