Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 11, 2009
Patent Application Number
11803864
Date Filed
May 16, 2007
Patent Primary Examiner
Patent abstract
The present invention provides a method of removing undesired isomers, including substituted cyclopentadiene regioisomers, from the desired fulvene in a crude fulvene composition by selectively reacting the undesired isomers with pyrrolidine and 4-(N,N-dimethylamino)benzaldehyde. This reaction converts the undesired substituted cyclopentadienes into fulvene-type compounds that is readily separated from the desired fulvene.
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