Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-08-03
2010-11-02
Seaman, D. Margaret (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S158000
Reexamination Certificate
active
07825251
ABSTRACT:
The present invention provides a process for producing carbostyril derivatives (I) which are known to be useful as medical drug such as antithrombotic agent, cerebral circulation improver, anti-inflammatory agent, antiulcer agent, etc. in a high yield and a high purity. The carbostyril derivatives (I) can be produced by reacting a carbostyril derivative (II) with a tetrazole derivative (III) in the presence of a phase transfer catalyst.
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European Examination Report issued in Applicat
Aki Shinji
Fukuyama Norihiro
Kurimura Muneaki
Minamikawa Jun-ichi
Nishi Takao
Finnegan Henderson Farabow Garrett & Dunner LLP
Otsuka Pharmaceutical Co. Ltd.
Seaman D. Margaret
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