Add time:08/23/2019         Source:sciencedirect.com

Tetradec-1-ene as a representative of higher olefins is hydroformylated in an aqueous—organic two-phase system by means of a water-soluble catalyst consisting of Rh4(CO)12 and surface active sulfobetaine derivatives of tris(2-pyridyl)phosphine. The surfactant complex ligands are obtained by sulfoalkylation of tris(2-pyridyl)phosphine with homologous alkyl-1,2-sultones (C3 to C14) in yields up to 84%. By variation of the sulfoalkyl chain of the surfactant phosphine an optimal system for the biphasic hydrofomylation of higher olefins is obtained. The catalytically active water-soluble rhodium carbonyl/surfactant—phosphine complex is quantitatively recovered by simple separation of the aqueous layer from the organic layer which contains the α-olefins and the products. The best yield (79%) in this rhodium-catalyzed micellar, biphasic hydroformylation of tetradec-1-ene is obtained with tris(2-pyridyl)phosphine sulfoalkylated by octane-1,2-sultone as the complex ligand.

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