Title:
METHOD FOR PRODUCING FLUORENONE
Document Type and Number:
WIPO Patent Application WO/2023/054644
Kind Code:
A1
Abstract:
The present invention provides a method for producing a fluorenone, the method comprising the following steps in the indicated sequence: an oxidation step for oxidizing fluorene in the presence of an aliphatic carboxylic acid having 2 to 3 carbon atoms, a metal catalyst, a bromine compound and oxygen; and a phosphoric acid treatment step for bringing the oxidation reaction mixture into contact with phosphoric acid.
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Inventors:
SUMI HIROKI (JP)
WATANABE YUKI (JP)
FUJITA HIDEAKI (JP)
NAKAMURA GOH (JP)
KUMANO TATSUYUKI (JP)
WATANABE YUKI (JP)
FUJITA HIDEAKI (JP)
NAKAMURA GOH (JP)
KUMANO TATSUYUKI (JP)
Application Number:
PCT/JP2022/036595
Publication Date:
April 06, 2023
Filing Date:
September 29, 2022
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C07C45/85; C07B61/00; C07C45/36; C07C49/675
Domestic Patent References:
| WO1997045393A1 | 1997-12-04 | |||
| WO2022085746A1 | 2022-04-28 |
Foreign References:
| US3038940A | 1962-06-12 | |||
| JP2004115390A | 2004-04-15 | |||
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| US4297514A | 1981-10-27 | |||
| CN106977378A | 2017-07-25 | |||
| US2859247A | 1958-11-04 | |||
| US3875237A | 1975-04-01 | |||
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| JPH11300212A | 1999-11-02 | |||
| JP2003144936A | 2003-05-20 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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