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. 10, 2010
Filed:
Apr. 05, 2001
Wolfgang Fitz, Amsterdam, NL;
Josef Kerler, Naarden, NL;
Harry Renes, Lelystad, NL;
Nico Bouter, Blaricum, NL;
Wolfgang Fitz, Amsterdam, NL;
Josef Kerler, Naarden, NL;
Harry Renes, Lelystad, NL;
Nico Bouter, Blaricum, NL;
Quest International B.V., GP Naarden, NL;
Abstract
NEW MATERIAL: A compound of formula I (R is 1˜6C alkyl other than ethyl, 2˜6C alkenyl). EXAMPLE: 2-Methyl 2-mercaptopropionate. USE: A durable flavor and taste imparting agent usable for foods, drinks, cosmetics, healthy and hygienic use, medicines, etc. PROCESS: A 2-mercaptopropionic acid of formula II (R' is H, 1˜6C alkyl or 2˜6C alkenyl) is esterified with an aliphatic alcohol of the formula R′(OH) in the presence of a catalyst, e.g. an inorganic acid such as sulfuric acid or organic acid such as acetic acid, in an azeotropic solvent, e.g. benzene, at 60˜100° C. to give the compound of formula I easily in high purity and yield. The molar amount of the aliphatic alcohol to be used is 1˜20 times, preferably 2˜5 times, that of the compound of formula II. The amount of the catalyst to be used is 0.1˜10 wt % based on the compound of formula II.