- Synthesis and crystal structure of some phosphite, thiophosphite, and amidophosphite copper(I) halide complexes
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Some Cu(I) halides complexes based on P(III) acid esters, {[(RE) 3PCuBr] (where E = O, N, S); R = n-Pr, i-Pr, Et2N} were obtained and characterized using IR, 31P NMR spectroscopy, and single crystal X-ray diffraction. The comparative structural characteristics of complexes with various donor atoms (E = O, N, S) are analyzed.
- Kursheva, Lidiya I.,Kataeva, Olga N.,Krivolapov, Dmitry B.,Gubaidullin, Aidar T.,Batyeva, Elvira S.,Sinyashin, Oleg G.
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- Silver-Catalyzed Regioselective Phosphorylation of para-Quinone Methides with P(III)-Nucleophiles
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A simple and efficient method for the silver-catalyzed regioselective phosphorylation of para-quinone methides (p-QMs) with P(III)-nucleophiles (P(OR)3, ArP(OR)2, Ar2P-OR) has been established via Michaelis-Arbuzov-type reaction. A broad range of P(III)-nucleophiles and para-quinone methides are well tolerated under the mild conditions, giving the expected diarylmethyl-substituted organophosphorus compounds with good to excellent yields. Moreover, a series of corresponding enantiomers can be obtained by employing dialkyl arylphosphonite (ArP(OR)2) as substrates. The control experiments and 31P NMR tracking experiments were also performed to gain insights for the plausible reaction mechanism. This protocol may have significant implications for the formation of C(sp3)-P bonds in Michaelis-Arbuzov-type reactions.
- Liu, Yu,Tang, Ke-Wen,Wong, Wai-Yeung,Xie, Jun,Xiong, Biquan,Xu, Shipan,Xu, Weifeng
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p. 14983 - 15003
(2021/11/12)
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- Synthesis and reactivity of substituted α-carbonylphosphonites and their derivatives
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Convenient methods for the synthesis of functionalized organophosphorus compounds containing carbonyl groups as well as di- or trialkoxymethyl fragments attached to phosphorus, and their derivatives, starting from the available derivatives of trivalent phosphorus acids, are proposed, and some properties of the new functionalized organophosphorus compounds are presented. So, the alkylation and acylation reaction of (dialkoxymethyl) phosphonites and their analogs have been studied. It is found that the Arbuzov rearrangement of these compounds was accompanied by the phosphorus-carbon bond cleavage with unique retention of the three-coordinate phosphorus.
- Prishchenko, Andrey A.,Livantsov, Mikhail V.,Novikova, Olga P.,Livantsova, Ludmila I.,Petrosyan, Valery S.
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experimental part
p. 352 - 372
(2012/08/28)
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- Synthesis of tervalent phosphorus esters in biphasic system using potassium phosphate as unique solid base
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The synthesis of tervalent phosphorus esters continues to be a significant area of interest, much of it again directed toward the synthesis of phosphite ligands for metal-catalyzed reactions. Typically, they were obtained through esterification of the corresponding phosphorus chlorides with the appropriate alcohols in the presence of an amine. In this paper, we present a new method for the synthesis of tervalent phosphorus esters, not yet mentioned in the literature, when potassium phosphate, as a unique base, is used in liquid-solid system. Symmetrical and unsymmetrical phosphites were obtained with good yields (65%-80%) using this method. The compounds were characterized by 31P NMR spectroscopy.
- Ilia, Gheorghe,Iliescu, Smaranda,Macarie, Lavinia,Popa, Adriana
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p. 360 - 364
(2008/09/20)
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- Electrochemical Oxidation of Metal Dialkyl Phosphites and Their Reaction with Halogens
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Electrochemical oxidation of sodium dialkyl phosphites with alkyl radicals of normal structure leads to formation of tetraalkyl pyrophosphites as the main products, while electrochemical oxidation of litium dialkyl phosphites and sodium salts with branched alkyl radicals yields tetraalkyl hypophosphates. The reaction of metal dialkyl phosphites with halogens leads to analogous results.
- Romakhin,Zagumennov,Nikitin
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p. 1022 - 1026
(2007/10/03)
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- OXIDATIVE ALKOXYLATION OF PHOSPHINE IN ALCOHOLIC SOLUTIONS OF PLATINUM(IV) HALIDE COMPLEXES
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Platinum(IV) halide complexes are shown for the first time to undergo fast reduction in alcohols (MeOH, EtOH, PrOH, BuOH, and i-AmOH) at 298-323 K under the action of PH3 to Pt(II)halide complexes with the highly selective formation of the corresponding trialkyl phosphites.The products of O-phosphorylation of the alcohols are studied by GLC and 31P NMR and IR spectroscopy.The intermediate compounds were studied by x-ray microanalyses and x-ray photoelectron and UV spectroscopy.The reaction is promoted by Pt(II) compounds and retarded by H2O and acids.The complex Pt(IV) chlorides are reduced more slowly than the mixed chloride bromide and especially chloride complexes.The kinetics and mechanism of this new reaction are discussed.
- Dorfman, Ya. A.,Levina, L. V.,Aibasov, E. Zh.
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p. 1847 - 1859
(2007/10/02)
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