Invention Grant
- Patent Title: Thiophene compound and process for producing caffenofuran or analogue thereof from the same
- Patent Title (中): 噻吩化合物及其制备方法
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Application No.: US11884737Application Date: 2006-02-22
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Publication No.: US07897790B2Publication Date: 2011-03-01
- Inventor: Shigeo Katsumura , Yanwu Li , Hisakatsu Iwabuchi , Masanobu Onishi , Yusuke Murakami
- Applicant: Shigeo Katsumura , Yanwu Li , Hisakatsu Iwabuchi , Masanobu Onishi , Yusuke Murakami
- Applicant Address: JP Osaka
- Assignee: San-Ei Gen F.F.I., Inc.
- Current Assignee: San-Ei Gen F.F.I., Inc.
- Current Assignee Address: JP Osaka
- Agency: Fitch, Even, Tabin & Flannery
- Priority: JP2005-045014 20050222
- International Application: PCT/JP2006/303122 WO 20060222
- International Announcement: WO2006/090716 WO 20060831
- Main IPC: C07D495/06
- IPC: C07D495/06

Abstract:
The present invention provides a novel thiophene compound as a synthetic intermediate that is useful for efficient production of kahweofuran or an analogue thereof. The present invention also provides a process for producing kahweofuran or an analogue thereof using the novel thiophene compound as an intermediate material.Of novel thiophene compounds represented by Formula (1): wherein R1 is a hydrogen atom or a C1-C4 lower alkyl group; R2 is a hydrogen atom or an alcohol-protecting group; R3 is a hydrogen atom, —COR4 or —C(OH)R5 (wherein R4 and R5 each represent a C1-C4 lower alkyl group); provided that when R2 and R3 are hydrogen atoms, R1 is not any of a hydrogen atom, methyl group, or n-propyl group; a thiophene compound represented by Formula (2) is reduced and cyclized in the presence of a transition metal catalyst to produce kahweofuran or kahweofuran analogue (3a) shown below: wherein R1 is a hydrogen atom or a C1-C4 lower alkyl group, and R4 is a C1-C4 lower alkyl group.
Public/Granted literature
- US20080167481A1 Novel Thiophene Compound and Process for Producing Caffenofuran or Analogue Thereof from the Same Public/Granted day:2008-07-10
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