Patent · US Expired

Process for the preparation of .omega.,.omega.-dialkoxycarboxylic acid derivatives

US4138418A · kind A · utility

3Cited by

1References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Klaus Warning · Eppstein, DE
Michael Mitzlaff

Key dates

Filing date	Mar 6, 1978
Grant date	Feb 6, 1979
Priority date	—
Expiry date	Mar 6, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C235/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

.omega.,.omega.-Dialkoxycarboxylic acid derivatives I (amides and esters) are prepared by heating .omega.-alkoxylactams II with hydrogen halide in an alcohol. When using only a catalytical quantity of hydrogen halide, there are obtained the amides, when using a quantity of hydrogen halide which is at least about equimolar, there are obtained the esters of the corresponding .omega.,.omega.-dialkoxycarboxylic acids. Since the compounds I are acetals, they may be readily converted into the corresponding .omega.-formyl compounds. Both the acetals I and the corresponding .omega.-formyl compounds are valuable intermediates for the synthesis of for example prostaglandins, sexual attractants and antioxidants.

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