Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a process for its preparation
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United States of America Patent
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Apr 15, 2008
Grant Date -
Aug 2, 2007
app pub date -
Jan 25, 2007
filing date -
Jan 31, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The compound, bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and to a process for its preparation, wherein bicyclo[4.3.0]nona-3,7-diene is reacted with synthesis gas in an homogeneous organic phase in the presence of transition metal compounds of Group VIII of the Periodic Table containing complex-bound organophosphorus compounds, and of excess organophosphorus compound, at temperatures of 70 to 160.degree. C. and pressures of 5 to 35 MPa, and the 3(4),7(8)-bisformylbicyclo[4.3.0]nonane thus obtained is oxidized, or is first hydrogenated to 3(4),7(8)-dihydroxymethylbicyclo[4.3.0]nonane and the diol thus obtained is reacted in an alkali melt.
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