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:
Oct. 22, 2024
Filed:
Sep. 28, 2022
Kumiai Chemical Industry Co., Ltd., Tokyo, JP;
Ryuji Tamai, Tokyo, JP;
Yukio Uchida, Tokyo, JP;
Fumiaki Takabe, Tokyo, JP;
Akira Kato, Tokyo, JP;
Ryo Maruyama, Tokyo, JP;
Ryo Kobayashi, Tokyo, JP;
Kumiai Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A method for producing a compound of a formula (3), including reacting a compound of a formula (1) with a compound of a formula (2) by using a tertiary alcohol and a base: where R, R, R, R, R, R, R, R, and Rare each independently a hydrogen atom, a halogen atom, a (C1-C4)alkyl, or a (C1-C4)alkoxy, the amount of the base used is 2.0-4.0 equivalents per 1 equivalent of the compound of formula (2), the amount of the tertiary alcohol used is 0.3-2.5 equivalents per 1 equivalent of the compound of formula (2), the base is a plurality of compounds comprising a lithium-containing base as a first compound, and a second compound selected from the group consisting of alkali metal hydrides, alkali metal amides, alkoxides, alkyl metals, alkali metals, and organic bases, and the reaction is performed in the presence of an aromatic hydrocarbon solvent.