Synthesis and auration of primary and di-primary heteroaryl-phosphines

Stephan A. Reiter, Stefan D. Nogai, Hubert Schmidbaur

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20 Scopus citations

Abstract

Convenient high-yield syntheses of the primary and di-primary heteroaryl-phosphines R PH2 and H2P-R'-PH2 (with R = 2-thienyl, 2-furyl, and R' = 2,5-thiophenediyl, 2,5-furandiyl, respectively) are presented. The products and a set of precursor molecules have been characterized by analytical and spectral data, and the crystal structures of selected molecules have been determined: 2-C4H 3O-PCl2, 2,5-(CI2P)2C 4H2O, 2,5-[(Et2N)2P] 2C4H2E (with E = O, S). In the crystals, the two molecules with -PCl2 substituents adopt trans conformations, while the other two have the -P(NEt2)2 groups rotated into a twist conformation. The reaction of the thienyl compounds with tris[(tert-phosphine)gold]oxonium tetrafluoroborates gave almost quantitative yields of the tri- and hexanuclear gold complexes, respectively: {2-C 4H3S-P[Au(PR3)]3}+BF 4- and [2,5-{[(R3P)Au]3P} 2C4H2S]2+(BF4 -)2, (R = Bu, Ph). The structures of the compounds with R3P = Bu3P ligands have been determined. In both cases the [2-C4H3/2S-P] units cap triangles of gold atoms in an array that can be described as three [Au(PR3)]+ cations bridged by a phosphido dianion(RP)2.

Original languageEnglish
Pages (from-to)247-255
Number of pages9
JournalDalton Transactions
Issue number2
DOIs
StatePublished - 21 Jan 2005
Externally publishedYes

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