Abstract
Data on changes in the activity of the Pd(dba)2/2TsOH/10Ph3P (dba is dibenzylideneacetone) and PdCl2(Ph3P)2/8Ph3P catalytic systems in the reaction of phenylacetylene with CO and n-butanol under the action of a solvent (aromatic hydrocarbons, chloroalkanes, ethers, esters, ketones, and dipolar aprotic media) are presented. The differences found in the response of either of the systems to changes in the properties of the medium are discussed in terms of a scheme of the catalytic cycle of reaction. It is noted that activity does not correlate with the physicochemical characteristics (polarity, basicity, and electron-acceptor ability) of solvents.
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