Invention Grant
- Patent Title: Processes for preparing tetrahydropyran-4-one and pyran-4-one
- Patent Title (中): 制备四氢吡喃-4-酮和吡喃-4-酮的方法
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Application No.: US10583562Application Date: 2004-12-17
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Publication No.: US07745649B2Publication Date: 2010-06-29
- Inventor: Shigeyoshi Nishino , Kenji Hirotsu , Hidetaka Shima , Shinobu Suzuki
- Applicant: Shigeyoshi Nishino , Kenji Hirotsu , Hidetaka Shima , Shinobu Suzuki
- Applicant Address: JP Ube-shi
- Assignee: UBE Industries, Ltd.
- Current Assignee: UBE Industries, Ltd.
- Current Assignee Address: JP Ube-shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2003-422053 20031219; JP2004-110673 20040405; JP2004-110674 20040405; JP2004-118686 20040414; JP2004-140152 20040510; JP2004-198148 20040705
- International Application: PCT/JP2004/018949 WO 20041217
- International Announcement: WO2005/061479 WO 20050707
- Main IPC: C07D309/30
- IPC: C07D309/30
Abstract:
The present invention relates to a process for preparing tetrahydropyran-4-one represented by the formula (1): which comprises reacting at least one kind of dihydropyran-4-one and pyran-4-one represented by the formula (2): wherein represents a single bond or a double bond, and hydrogen (a) in the presence of a metal catalyst, in a mixed solvent of an aprotic solvent and an alcohol solvent, or (b) in the presence of an anhydrous metal catalyst in which a hydrated metal catalyst is subjected to dehydration treatment, in a hydrophobic organic solvent.
Public/Granted literature
- US20070078272A1 Processes for preparing tetrahydropyran-4-one and pyran-4-one Public/Granted day:2007-04-05
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