Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a process for its preparation
AssigneeOxea Deutschland GmbH
InventorsHelmut Springer, Paolo Bavaj
Life of this patent
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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° 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.
Claims16
A process for preparing bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid by hydroformylating bicyclo[4.3.0]nona-3,7-diene with subsequent oxidation, which comprises reacting bicyclo[4.3.0]nona-3,7-diene 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° C. and pressures of 5 to 35 MPa, and then oxidizing the resulting 3(4),7(8)-bisformylbicyclo[4.3.0]nonane to obtain bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid.
A process for preparing bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid by hydroformylating bicyclo[4.3.0]nona-3,7-diene with subsequent hydrogenation and subsequent reaction in an alkali melt, which comprises reacting bicyclo[4.3.0]nona-3,7-diene 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° C. and pressures of 5 to 35 MPa, hydrogenating the 3(4),7(8)-bisformylbicyclo[4.3.0]nonane thus obtained to obtain 3(4),7(8)-dihydroxymethylbicyclo[4.3.0]nonane, reacting the 3(4),7(8)-dihydroxymethylbicyclo[4.3.0]nonane thus obtained in an alkali melt at elevated pressure, and then releasing bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid.
The bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid.
Dependencies are inferred from the claim text.