Patent · US Expired

Two phase preparation of carboxylic acid esters

US6583313B1 · kind B1 · utility

0Cited by

5References

8Claims

0Family size

Assignee

SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

Max Braun · Großburgwedel, DE
Kerstin Eichholz · Langenhagen, DE
Werner Rudolph · Hannover, DE

Key dates

Filing date	Jul 10, 1998
Grant date	Jun 24, 2003
Priority date	—
Expiry date	Jan 30, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The methyl and ethyl esters of trifluoroacetic acid or chlorodifluoroacetic acid can be prepared in a technically simple manner from the corresponding acid chlorides and methanol or ethanol, respectively, in the presence of an “onium” salt of the acid as a catalyst. The alcohol is used in a stoichiometric excess, namely the molar ratio of alcohol to acid chloride is selected such that operation is in the region of a two-phase reaction. One of the phases is formed by the desired ester product, which is obtained in a high purity without any distillation.

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