A cyclic vicinal bis(tetraketone) and structural investigations of formoins
Investigations of simple formoins such as 2,5-bis(1,1-dimethyl-2-phenylethyl)-2,4-dihydroxyfuran-3(2H)-one (17), benzoylformoin (18), p-toluoylformoin (19), pivaloylformoin (20), and the 2,4-dihydroxy-2,5-bis(heterocycl-2-yl)furan-3-ones 21−23 (heterocycle = furan, thiophene, selenophene) by NMR spe...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 July 2004
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| In: |
European journal of organic chemistry
Year: 2004, Heft: 15, Pages: 3212-3220 |
| ISSN: | 1099-0690 |
| DOI: | 10.1002/ejoc.200400157 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1002/ejoc.200400157 Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/ejoc.200400157 
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| Verfasserangaben: | Matthias Peter, Rolf Gleiter, Frank Rominger, and Thomas Oeser |
MARC
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| 245 | 1 | 2 | |a A cyclic vicinal bis(tetraketone) and structural investigations of formoins |c Matthias Peter, Rolf Gleiter, Frank Rominger, and Thomas Oeser |
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| 520 | |a Investigations of simple formoins such as 2,5-bis(1,1-dimethyl-2-phenylethyl)-2,4-dihydroxyfuran-3(2H)-one (17), benzoylformoin (18), p-toluoylformoin (19), pivaloylformoin (20), and the 2,4-dihydroxy-2,5-bis(heterocycl-2-yl)furan-3-ones 21−23 (heterocycle = furan, thiophene, selenophene) by NMR spectroscopy in DMSO showed the dihydroxyfuranone skeleton and not an enediol structure. The formoin 17 was oxidized to the corresponding tetraketone 10. The intermolecular double benzoin condensation of 1,4-bis(2,2dimethyl-3,4-dioxobutyl)benzene (27) affords, in low yield, the bis(formoin) 29, and this could be oxidized to provide 2,2,2′,2′,7,7,7′,7′-octamethyl[8.8]paracyclophan-3,3′,4,4′5,5′6,6′-octaone (9). The molecular structures of 17 and 29, the monohydrate of 10 (30), and also the dihydrate of 9 (31) are reported. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) | ||
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