Invention Grant
- Patent Title: Method for producing 2-bromo-4,5-dialkoxy benzoic acid
- Patent Title (中): 2-溴-4,5-二烷氧基苯甲酸的制备方法
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Application No.: US13991242Application Date: 2011-12-06
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Publication No.: US09096511B2Publication Date: 2015-08-04
- Inventor: Ryu Nakao
- Applicant: Ryu Nakao
- Applicant Address: JP Tokyo
- Assignee: ZERIA PHARMACEUTICAL CO., LTD.
- Current Assignee: ZERIA PHARMACEUTICAL CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-272668 20101207
- International Application: PCT/JP2011/078169 WO 20111206
- International Announcement: WO2012/077673 WO 20120614
- Main IPC: C07C65/00
- IPC: C07C65/00 ; C07C51/363 ; C07C51/367
Abstract:
Provided is a method for effectively producing a 4,5-dialkoxy-2-hydroxybenzoic acid from an inexpensive raw material.A method for producing a 2-bromo-4,5-dialkoxybenzoic acid represented by the following formula (2): (wherein each of R1 and R2 represents a lower alkyl group), the method including causing a 3,4-dialkoxybenzoic acid represented by the following formula (1): (wherein R1 and R2 have the same meanings as defined above) to react with bromine in concentrated hydrochloric acid.
Public/Granted literature
- US20130253222A1 METHOD FOR PRODUCING 2-BROMO-4,5-DIALKOXY BENZOIC ACID Public/Granted day:2013-09-26
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