Patent · US Expired

Process of preparing N-substituted aldonamides having improved color and color stability

US5401839A · kind A · utility

12Cited by

8References

21Claims

0Family size

Assignee

Lever Brothers Company, division of Conopco, Inc. · US

Inventors

Van Au · Oxford, US
Bijan Harirchian · South Orange, US

Key dates

Filing date	Mar 23, 1993
Grant date	Mar 28, 1995
Priority date	—
Expiry date	Mar 23, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C235/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process of preparing N-substituted aldonamides, the process including the steps of mixing and reacting an aldonolactone and an amine in an organic polar solvent, in the presence of an antioxidant and a reducing agent. The aldonamides have improved color; the discoloration or browning of the aldonamides upon storage or elevated temperature processing is eliminated or substantially minimized.

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