- Synthesis and analytical characterization of functionalized β-hydroxydithiocinnamic acids and their esters. Complex chemistry towards nickel(II), palladium(II), and platin(II)
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Starting from silyl-protected 4-hydroxy acetophenone (1) the 1,1-ethenedihiolato complexes 3-5 were synthesised using carbon disulfide and potassium-tert-butylate as a base. After being deprotected, the resulting 4-hydroxy-substituted complexes 6-8 were esterified with DL-α-lipoic acid to obtain the compounds 9-11. The resulting complexes were characterized using NMR spectroscopy, mass spectrometry and IR spectroscopy. 3-substituted β-hydroxydithiocinnamic acid methyl ester (12) was obtained via an analogous path of reaction using silyl-protected 3-hydroxy acetophenone (2), carbon disulfide and methyl iodide. After removing of the silyl group the resulting hydroxy group was esterified with DL-α-lipoic acid. Using the dithioacid ester 14 as a ligand the NiII (15), PdII (16) and PtII (17) [O,S] complexes were obtained.
- Schubert, Karsten,Alpermann, Theodor,Niksch, Tobias,Goerls, Helmar,Weigand, Wolfgang
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p. 1033 - 1042
(2008/10/09)
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