- BENZIMIDAZOLIDES OF TRIVALENT PHOSPHORUS ACIDS
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The synthesis and chemical properties of phosphorus(III) acid benzimidazolides were investigated, and these compounds were shown to be effective phosphorylating agents.The rate of their methanolysis and diethylaminolysis is greatly dependent on the nature of the substituent an the phosphorus atom.In cyclounsymmetric 2-(benzimidazol-1-yl)-4-methyl-1,3,2-dioxaphosphorinane the axial orientation of the exocyclic substituent predominates.
- Iorish, V. Yu.,Grachev, M. K.,Bekker, A. R.,Nifant'ev, E. E.
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p. 551 - 556
(2007/10/02)
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- LES REACTIFS TRICOORDINES DE PHOSPHONYLATION. I. SYNTHESE ET PROPRIETES DE NOUVEAUX COMPOSES DU PHOSPHORE TRI ET PENTACOORDINE CONTENANT LE MOTIF P-O-N
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The new phosphites 2a, 2b, 2c, 5a, 5b, 7b, 8b, and spirophosphorans 3a, 3b, 4a, 3bx1 have been synthetized as specific new reagents of hydroxy functions.The phosphoran's formation mechanism is discussed and some observations concerning the isomerization P
- Bailly, Theodorine,Burgada, Ramon
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- α CETOPHOSPHONATES ET ESTERS CYCLIQUES D'HYDROXYMETHYLENES DIPHOSPHONATES SYNTHESES, STRUCTURES ET HYDROLYSE
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Synthesis of symmetrical diesters derived from hydroxy methylene diphosphonic acids 1 to 8 is described either in one step or via the corresponding α ketophosphonate 1a to 8a.Study of the diphosphonates (1 to 6) -> phosphate-phosphonates (1b to 6b) isomerization has been realized.Results related to peculiar cases in connection with nonsymmetrical esters 10, 11, 17 and study of the hydrolysis reaction of diphosphonates are presented.
- Tromelin, Anne,El Manouni, Driss,Burgada, R.
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p. 301 - 312
(2007/10/02)
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- YLURES SANS SEL, EVOLUTION EN PHOSPHORANES ET EQUILIBRE YLURE PHOSPHORANE I. SYNTHESE ET STRUCTURE
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Synthesis of new salt-free ylids 9, 12 to 16, 19, 20, 22, 27 and 29 and phosphoranes 10, 17, 18, 21, 23, 30 to 33 by addition of a trivalent phosphorus compound (phosphites and amino-phosphines) 1 to 7 with dimethyl acetylenedicarboxylate in presence of a protic trapping reagent are described.The results are consistent with trapping of carbanionic species.In relation with the cyclic or acyclic structure of the trivalent phosphorus compound and the protic trapping reagent ie: methanol, phenol, carboxylic acid, etc.., several pathways are involved.Clearly, three phenomena are shown: one can obtain an ylid via a phosphorane or conversely a phosphorane via an ylid or an equilibrium phosphorane ylid.Results are dealing with thermodynamic or kinetically controlled reactions.
- Burgada, R.,El Khoshnieh, Y. O.,Leroux, Y.
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p. 1207 - 1222
(2007/10/02)
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