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Synthesis and catalytic chemistry of two new water-soluble chelating phosphines. Comparison of ionic and nonionic functionalities

✍ Scribed by Gregory T. Baxley; T.J.R. Weakley; Warren K. Miller; David K. Lyon; David R. Tyler

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 787 KB
Volume: 116
Category: Article
ISSN: 1381-1169
DOI: 10.1016/s1381-1169(96)00143-4

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✦ Synopsis

Two new water-soluble chelating alkyl phosphines are described. The compounds are prepared by radical addition of allylic substrates to 1,2-bis(phosphino)ethane in methanol. Complexes with the stoichiometry of 1.5: 1 diphosphine:rhodium(I) are effective in the hydrogenation of the olefins I-hexene and crotonaldehyde. Catalyst solutions prepared with the ligand DSPrPE were found to be 3 times more active than those prepared with TPPTS (triphenylphosphine trisulfonate) under identical conditions. Several rhodium complexes of the two ligands are described, and the crystal structure of Rh(l,Zbis[(dihydroxypropyl)phosphino]ethane}&l was determined.

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