| 摘要 |
Supported catalyst for the preparation of monocarboxylic anhydrides of the disclosure In a supported catalyst for the preparation of monocarboxylic anhydrides by carbonylation of the appropriate esters or ethers, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table of the Elements, the coupling agent is a chelate-forming organosilicon compound of the general formula a) <IMG> or b) <IMG> where X = Cl, Br or -OR2; Y = -NR?, a nitrogen-containing aryl radical, -PR?, AsR?, -SR4 or -SH; Z = zero, arylene or phenylene (optionally ortha-, meta or para-substituted), R1 = C1 to C5-alkyl, R2 = C1 to C5-alkyl or -C6H5; R3 = -H or C1 to C3-alkyl; R4 = C1 to C6-alkyl, C5 or C6-cycloalkyl or -C6H5 or -CH2C6H5, which are optionally substituted by halogen, methoxy, ethoxy or C1 to C3-alkyl groups; n = 0 or 1 or 2; m = 2 to 6, preferably 2 to 4.
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