| 1. |
- Bäckvall, Jan-Erling, et al.
(författare)
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Evidence for (π-allyl)palladium(II)(quinone) complexes in the palladium-catalyzed 1,4-diacetoxylation of conjugated dienes
- 1988
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Ingår i: Tetrahedron Letters. - 0040-4039 .- 1359-8562. ; 29:18, s. 2243-2246
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Tidskriftsartikel (refereegranskat)abstract
- Evidence for a coordination of p-benzoquinone to palladium in [4-acetoxy-η3-(1,2,3)-cyclohexenyl]-palladium(II) complexes was provided by changes of the 1H NMR chemical shift values of the π-allyl protons and a decrease of the spin-lattice relaxation time constant for the p-benzoquinone protons. The intermediate (π-allyl)palladium(benzoquinone) complexes previously postulated in palladium-catalyzed 1,4-oxidations of 1,3-dienes were detected by NMR spectroscopy.
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| 2. |
- Bäckvall, Jan-Erling, et al.
(författare)
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Palladium‑Hydroquinone Catalysed Electrochemical 1,4‑Oxidation of Conjugated Dienes
- 1987
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Ingår i: Journal of the Chemical Society. Chemical communications. - 0022-4936. ; 16, s. 1236-1238
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Tidskriftsartikel (refereegranskat)abstract
- The mediator system palladium(II)–hydroquinone was shown to catalyse the anodic oxidation of cyclohexa-1,3-diene in acetic acid to produce selectively either trans- or cis-1,4-diacetoxycyclohex-2-ene (1) depending on the conditions.
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| 3. |
- Gogoll, Adolf, 1957-, et al.
(författare)
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Complete 1H and 13C NMR spectral assignment of venturicidin A by 2D NMR spectroscopy
- 1989
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Ingår i: Magnetic Resonance in Chemistry. - : Wiley. - 0749-1581 .- 1097-458X. ; 27:9, s. 863-871
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Tidskriftsartikel (refereegranskat)abstract
- After correlation of the majority of signals by COSY and one-bond heteronuclear correlation, the complete assignment of the 1H and 13C NMR spectra of the macrolide antibiotic venturicidin A required the application of long-range CH coupling information. This was accessible by the COLOC-S and selective INEPT experiments, and the sensitivity of these experiments is discussed. Steric information was obtained from a NOESY spectrum, and the solution structure compared with that in the crystal.
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