Process for preparing carboxylic acid anhydrides

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260546, C07C 5312, C07C 5326, C07C 6304

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active

041154444

ABSTRACT:
A carboxylic acid anhydride such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of a halide, carbon monoxide and a Group VIII noble metal in the presence of promoters comprising at least one metal of Groups IVB, VB, and VIB or a non-noble metal of Group VIII, or their compounds and an organo-nitrogen compound or an organo-phosphorus compound wherein the nitrogen and phosphorus are trivalent.

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Falbe, "CO in Org. Syn", pp. 78-79 (1970).
House, "Modern Synthetic Reactions", 2nd edition, 1972, W. A. Benjamin Inc., Menlo Park, Calif., p. 786.

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