- Reductive metalation of 1,2-diaryl-substituted ethenes: Synthetic applications
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Reduction of 1,2-diaryl-substituted ethenes with Na metal in dry THF allowed easy access to a variety of 1,2-diaryl-1,2-disodiumethanes. These diorganometallic intermediates were elaborated into the corresponding 1,2-diarylethanes (aqueous work up), or cycloalkylated with 1,3- dichloropropanes. The last reaction led to a highly diastereoselective synthesis of trans-1,2-diaryl-substituted cyclopentanes.
- Azzena, Ugo,Dettori, Giovanna,Lubinu, Caterina,Mannu, Alberto,Pisano, Luisa
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p. 8663 - 8668
(2007/10/03)
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- Alkylation and Ring Formation by Electroreductive Coupling of Arylalkenes and Alkyl Mono- and Di-halides
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The electroreduction of a solution in N,N-dimethylformamide of an arylalkene and either an alkyl bromide or an alkane-α,ω-diyl dibromide in the presence of a sacrificial aluminium anode affords a monoalkylated or cyclic product, respectively.
- Leonel, Eric,Paugam, Jean Paul,Nedelec, Jean-Yves,Perichon, Jacques
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p. 278 - 279
(2007/10/03)
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- Synthesis of new chiral bis(triarylphosphine) ligands based on asymmetric hydrogenation of 4,5-diaryl-2-oxocyclopentanecarb oxylates
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New chiral bis(triarylphosphine) ligands, trans-bis(3-diphenylphosphinophenyl)cyclopentane and trans-bis(2-diphenylphosphinophenyl)cyclopentane, have been prepared in optically pure forms based on asymmetric hydrogenation of 4,5-diaryl-2-oxocyclopentaneca
- Fukuda, Norio,Mashima, Kazushi,Matsumura, Yoh-Ichi,Takaya, Hidemasa
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p. 7185 - 7188
(2007/10/02)
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- Intramolecular Reactions of 1,5-Diaryl-1,5-pentadiyl Radicals
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Photochemical decomposition of 2,6-diarylcyclohexanones 1a-d yields 1,2-diarylcyclopentanes 4 and 1,5-diaryl-1-pentenes 5 by intramolecular reaction of the intermediate 1,5-diaryl-1,5-pentadiyls 3.The two stereoisomers cis-4 and trans-4 are formed in equa
- Peyman, Anuschirwan,Beckhaus, Hans-Dieter,Ruechardt, Christoph
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p. 1027 - 1032
(2007/10/02)
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