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1.
A new reaction of organolithium compounds with phosphonium salts is described; reaction of t-butyllithium with dibenzylaminophosphonium or tetraphenylphosphonium bromides takes place through addition of the t-butyl group on a benzene ring at the position para to the phosphorus atom, the ylid formed reacts in a characteristic Wittig reaction with p-tolylaldehyde. 相似文献
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Pascal P CellierJean-Francis Spindler Marc Taillefer Henri-Jean Cristau 《Tetrahedron letters》2003,44(38):7191-7195
Treatment of aryl and heteroaryl halides with catalytic amounts of Pd/C in the presence of hydrazine hydrochloride in basic medium (sodium hydroxide or sodium t-butylate) at room temperature leads to the corresponding hydrodehalogenation products with high selectivity. Aryl iodides, bromides, chlorides and fluorides can be reduced using this reagent combination. The reduction is compatible with various electron-donating or electron-withdrawing groups. 相似文献
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Henri-Jean Cristau Marc Taillefer Jean-Paul Urbani 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Phosphonium diylides 1 react with electrophiles leading to new monoylides which permit., by a Wittig reaction, the E stereoselective synthesis of various di- or tri-substituted α,β-unsaturated functionalized compounds. 相似文献
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Z. H. Kudzm S. W. Skrzypek R. Skowronski H. J. Cristau F. Plenat 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract In this presentation we attempted to verify the enigmatical problem of the polaro-graphical activity of the phosphonic function, especially its electrochemical reduction. Thus, the first report on the polarographic activity of the nitro substituted phenylphos-phonic acid was presented by Kosolapov and Jenkins in 1957 [2]. 相似文献
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Corinne Combes Francoise Plenat Henri-Jean Cristau 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract We describe some new cyclotriphosphazenes in which the phosphorus substituents are either free rotating aromatic or heteroaromatic groups, or rigid spirobiaryl units. 相似文献
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Henri-Jean Cristau Amer Hammami Marc Taillefer Eliane Torreilles 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract The reaction of Ph3P-N-Li(12) with various α,β-unsaturated esters gives access to new N-(α,β-unsaturated acyl) phosphinimines. which can undergo intramolecular aza-Wittig reaction (at 65 - 110°C) to afford the corresponding nitriles. 相似文献
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E. Torreilles H. J. Cristau J. F. Ginieys 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract We compare the Sodium Perborate and various Phosphonium and Ammonium Perborates in their abilities to hydrolyse a series of phosphoric and phosphonic acid esters [OP]. 相似文献
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H.-J. Cristau E. Torreilles T. Cussagne C. Lion M. Desgrunges G. Magnaud 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Despite its self-decomposition, Magnesium MonoPeroxyPhtalate 4 is an excellent reagent to totally detoxify phosphonothiolate 1 and fluoridate 2 in basic aqueous medium. 相似文献
10.
Marc Taillefer Nicolas Rahier Ewelina Minta Henri-Jean Cristau 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6-7):1847-1850
The lithium triphenylaminophosphonium azayldiide 1 proved again to be a very good tool in organic synthesis, allowing further synthesis of various compounds such as vinyl nitriles, aromatic or heteroaromatic nitriles, and mono-, bis-, and trisphosphinimines. 相似文献