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:
Jan. 12, 2021
Filed:
Dec. 26, 2019
Applicant:
Tokiwa Phytochemical Co., Ltd., Sakura, JP;
Inventors:
Jin Tatsuzaki, Sakura, JP;
Tsutomu Ishikawa, Sakura, JP;
Assignee:
TOKIWA PHYTOCHEMICAL CO., LTD., Sakura, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 311/30 (2006.01);
U.S. Cl.
CPC ...
C07D 311/30 (2013.01);
Abstract
A method of producing an alkoxyflavone derivative involves a step of reacting hydroxyflavone derivative which is shown in the below chemical formula and dialkyl sulfate in the presence of dimethyl sulfoxide and an alkali hydroxide. Further, in the chemical formula below, R-R, R-Rand Rare independently one of hydrogen, hydroxyl group, ester group, alkoxy group, alkylenedioxy group, sulfonyl group and alkyl group, respectively. However, at least two of R-Rand Rare hydroxyl groups.