Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a...

Details Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a... Bicyclo[4.3.0]nonane-3(4),7(8)-dicarboxylic acid and a...

2008-04-15

2008-04-15

Jiang, Shaojia Anna (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

11657760

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.

REFERENCES:
patent: 3271365 (1966-09-01), Parham
patent: 4262147 (1981-04-01), Garrou et al.
patent: 5041675 (1991-08-01), Lukas et al.
Journal of the American Chemical Society (1958) 80, S. 5502-5 Cyclic Polyolefins Arthur Cope and William Keller.

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