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. 20, 1991
Filed:
Sep. 06, 1990
Makoto Shibagaki, Yokohama, JP;
Kyoko Takahashi, Yokohama, JP;
Hideyuki Kuno, Yokohama, JP;
Ichiro Honda, Yokohama, JP;
Masataka Mori, Yokohama, JP;
Hajime Matsushita, Yokohama, JP;
Japan Tobacco Inc., Tokyo, JP;
Abstract
Levoglucosenone is prepared by reaction sequence using 1,6-anhydro-.beta.-D-galactopyranose as a starting material. First, the starting material is reacted with ortho formate, obtaining an ortho ester of said starting material. Then, the ortho ester is placed under the conditions for a reductive elimination reaction of the ortho formate part of said ortho ester, thereby converting said ortho ester to a 1,6-anhydro-3,4-dideoxy derivative. The dideoxy derivative is placed under the conditions for oxidation of the hydroxy group of said dideoxy derivative, thereby forming levoglucosenone.