The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1995
Filed:
Feb. 08, 1994
Jean C Yadan, Paris, FR;
Jinzhu Xu, Ivry sur Seine, FR;
Bioxytech, Bonneuil-Sur-Marne, FR;
Abstract
The invention relates to a novel process for the preparation of ergothioneine. The process for the chemical synthesis of the different optical forms of ergothioneine essentially comprises steps which consist in preparing or using an N.sub..alpha.,N.sub..alpha. -dimethylated histidine ester salt (optically active if necessary), treating this compound with an alkyl, alkenyl or aryl halogenothionoformate in the presence of a base, protecting the sulfur-containing substituent in the compound obtained, converting this protected compound to a compound of the trimethylammonium type and freeing the desired ergothioneine by saponification or acid hydrolysis, as appropriate. This process affords a better yield and ensures an excellent optical purity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile