Invention Grant
- Patent Title: Method of producing aminophenol compounds
- Patent Title (中): 制备氨基苯酚化合物的方法
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Application No.: US10593968Application Date: 2005-03-25
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Publication No.: US07750156B2Publication Date: 2010-07-06
- Inventor: Hiroshi Kiyokawa , Shinji Aki
- Applicant: Hiroshi Kiyokawa , Shinji Aki
- Applicant Address: JP Tokyo
- Assignee: Otsuka Pharmaceutical Co., Ltd.
- Current Assignee: Otsuka Pharmaceutical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2004-089652 20040325
- International Application: PCT/JP2005/006408 WO 20050325
- International Announcement: WO2005/092832 WO 20051006
- Main IPC: C07D241/04
- IPC: C07D241/04 ; C07D401/00 ; C07D211/40

Abstract:
The present invention provides an industrially advantageous method of producing aminophenol compounds represented by the formula (1) by a simple and easy procedure at a high yield and a high purity. The present invention provides a method of producing an aminophenol compound represented by the formula (1): (wherein each of R1 and R2, which may be the same or different, is a hydrogen atom, a substituted or unsubstituted lower alkyl group or the like; R1 and R2, taken together with the adjacent nitrogen atom, may form a 5- or 6-membered heterocycle with or without other intervening heteroatoms; the heterocycle may be substituted by 1 to 3 substituents selected from the group consisting of a hydroxyl group, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group and the like; and the hydroxyl group in the formula (1) is substituted on the 2- or 4-position to the amino group on the phenyl ring), which comprises allowing a cyclohexanedione compound represented by the formula (2) to react with an amine compound represented by the formula (3) (wherein R1 and R2 are as defined above), under a neutral or basic condition.
Public/Granted literature
- US20070219374A1 Method of Producing Aminophenol Compounds Public/Granted day:2007-09-20
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