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:
May. 12, 1992
Filed:
Sep. 17, 1990
Koshi Koseki, Yokohama, JP;
Takashi Ebata, Yokohama, JP;
Hiroshi Kawakami, Yokohama, JP;
Hajime Matsushita, Yokohama, JP;
Kazuo Itoh, Tokyo, JP;
Yoshitake Naoi, Tokyo, JP;
Japan Tobacco Inc., Tokyo, JP;
Yuki Gosei Kogyo Co., Ltd., Tokyo, JP;
Abstract
(S)-4-hydroxymethyl-.gamma.-lactone is prepared by oxidizing dihydrolevoglucosenone with a peracid in an organic solvent. (S)-4-hydroxymethyl-.gamma.-lactone is prepared from levoglucosenone. First, levoglucosenone is catalytic hydrogenated, thereby dihydrolevoglucosenone is obtained. Next, dihydrolevoglucosenone thus obtained is oxidized with a peracid in an organic solvent, thereby (S)-4-hydroxymethyl-.gamma.-lactone is obtained. In this manner, (S)-4-hydroxymethyl-.gamma.-lactone can be obtained with high optical purity.