Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1984-08-16
1986-01-07
Trousof, Natalie
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
502166, C07C 5156
Patent
active
045633096
ABSTRACT:
A process for the production of organic carboxylic anhydrides by the catalytic reaction of a methyl carboxylate and carbon monoxide in contact with a homogeneous catalyst system of rhodium metal atom, a phosphorus-containing ligand in which there is present at least one oxo (.dbd.O) oxygen atom attached to a phosphorus atom or a carbon atom to form a Z group and the ##STR1## group in said Z group is located at least one carbon atom removed and preferably from 2-4 carbon atoms removed from the phosphorus atom of the molecules represented by the formulas ##STR2## and a halogen source, under mild reaction conditions, wherein R' is aryl, alkaryl, aralkyl or alkyl, and wherein 1 or more of said R' groups can be substituted with a Z group but not more than 3 of said R' groups in the molecule are so substituted; a is an integer from 0-4; b is an integer from 0-3; and Z is P(O)R'R'; --C(O)OR" or C(O)R", wherein R" is R' or --H.
REFERENCES:
patent: 4046807 (1977-09-01), Kuckertz
patent: 4251458 (1981-02-01), Pugach
Lomakina, L. N. et al., Chemical Abstracts, vol. 92 (1980), #208,352y.
Hendriksen L.
Trousof Natalie
Union Carbide Corporation
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