Palladium-catalyzed hydroformylation of terminal arylacetylenes with glyoxylic acidElectronic supplementary information (ESI) available: Experimental procedure and analytical data of hydroformylation products. See DOI: 10.1039/c7cc09629a

A simple, practical and governable palladium-catalyzed hydroformylation of terminal arylacetylenes has been disclosed. The reaction proceeds under syngas-free conditions, using readily available glyoxylic acid as the formyl source, under mild conditions, giving rise to a broad range of α,β-unsaturated aldehydes. A reaction process under syngas-free conditions using common ligands and terminal alkyne substrates. The mechanism has been studied.