Two complementary transformations in one go: A rhodium-catalyzed transformation has been developed in which a phenol reacts with a 4-alkynal to furnish a cis-4-alkenoate in good yield (see scheme; dppe=1,2-bis(diphenylphosphino)ethene). This novel tandem process couples the reduction of an alkyne to an alkene with the oxidation of an aldehyde to an ester.
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Tanaka et al. (2002) studied this question.
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