- Simple, efficient, and stereoselective oxidation of triphenylfurans to cis-but-2-ene-1,4-diones
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Triphenylfurans are stereoselctively oxidized to cis-but-2-ene-1,4-diones, suitable precursors of 3(2H)-furanones, in very good yields using ammonium nitrate or potassium nitrate in 80% aqueous acetic acid. Copyright Taylor & Francis Group, LLC.
- Rappai, John P.,Prathapan, Sreedharan,Unni, Manthitta V. Vishnu,Unnikrishnan, Perupparampil A.
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- Sequential electrochemical oxidation of alternating benzene-furan oligomers
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(Graph Presented) Electrochemical oxidation of pentaaryl 2 containing two furan moieties occurs sequentially to give diketone 8 after two-electron transfer. Further oxidation with another two-electron transfer gives the corresponding tetraketone 9. Radica
- Lin, Cheng-Lan,Wu, Yi-Lin,Chen, Chang-Li,Chou, Chih-Ming,Luh, Tien-Yau
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p. 8531 - 8534
(2008/03/11)
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- A novel one-pot synthesis of substituted pyridazines: A general method of preparation of 3,4,6-tri aryl pyridazines
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3,4,6-triaryl pyridazines 4 were conveniently prepared in one step by the condensation of aryl methyl ketones and 1,2-diketones in presence of base, followed by cyclisation with hydrazines.
- Nongkhlaw, Rishan Lang,Nongrum, Ridaphun,Myrboh, Bekington
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p. 465 - 472
(2007/10/03)
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- Oxidation of furans with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)
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2,5-Disubstituted furans were oxidatively cleaved to 2-butene-1,4- diones with DDQ in CH2Cl2-DMSO. In particular, 3-alkoxy-2,5-diphenylfurans were selectively converted into cis-2-alkoxy-1,4-diphenyl-2-butene-1,4-diones with DDQ in C
- Sayama, Shinsei,Inamura, Yutaka
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p. 1371 - 1374
(2007/10/03)
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- OXIDATIVE AND BASIC TRANSFORMATIONS OF SOME 1-HETEROARYLOLIGOPHENYLPYRIDINIUM SALTS. LIMITATIONS TO THE APPLICABILITY OF FERRICYANIDE OXIDATION
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Ferricyanide oxidation of 2,3,4,6-tetraphenyl-1-(2'-pyridyl)pyridinium perchlorate (III) gave, in addition to the biheterocyclic product Ib,two pyrrole derivatives IIb and IIc and in some conditions also the diketone IV.Additional pyrrole derivatives, VII
- Bohm, Stanislav,Kubik, Richard,Nemecek, Jan,Kuthan, Josef
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p. 1672 - 1683
(2007/10/02)
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