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I. A. Nuretdinov V. A. Mamedov E. V. Bayandina L. K. Nikonorova A. A. Shtyrlina A. E. Arbuzov 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract The reaction of the derivatives of 3-phenyl-3-chloro-2-oxopropionic acid with the trivalent phosphorus compounds has been studied. The esterification or amidation of this acid have been shown to influence the course of reaction with Ph3P. In the reaction with esters enolphosphonium salts are produced, ketophosphonium salts are obtained when amides are involved. Properties of these compounds have also been studied in the Wittig reaction. 3-(α-chlorobenzyl)-2-oxoquinoxaline which reacted with trialkyl phosphates (Arbuzov reaction) has been synthesized. These phosphonates are obtained in nearly quantitative yields, in alkaline conditions (Horner-Emmons reaction) they react smoothly with aromatic aldehydes to give the substituted vinylyuinoxalines. 相似文献
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合成了11个新的硫羰磷酸酯及其11个异构化产物硫羟磷酸酯,其结构经1HNMR、元素分析证实。研究了温度、溶剂对异构化反应的影响,并对反应机理进行了讨论。 相似文献
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Kataev V. A. Spirikhin L. V. Khaliullin A. N. Gailyunas I. A. 《Russian Journal of Organic Chemistry》2002,38(10):1507-1509
The alkylation of 2-chloro-5(6)-nitrobenzimidazole with 2-chloromethylthiirane was studied for the first time. Depending on the conditions, isomeric mixtures of nitro-substituted 2-chloro-1-(thietan-3-yl)benzimidazoles and dihydrothiazolo[3,2-a]benzimidazoles were obtained. 相似文献
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Russian Journal of General Chemistry - Approaches to the synthesis of a wide range of phosphorylated derivatives of 3-(furyl)acrylic acid and 4-(furyl)buten-2-one with various functional groups in... 相似文献
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Hongwu He Liang Xu Zhaojie Liu 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract In the study of the nucleophilic addtion reaction of dialkyl I-hydroxyphosphonate and dichloropyrimidinyl isocyanate. We found this reaction was a convenient way for the synthesis of 1-(substituted carbamy1oxy)alkyl phosphonatc derivative. Dialkyl 1 - hydroxyphos-phonate can be easily prepared by addtion of dialkylphosphitc to carbonyl compounds. 4,6-dicloro-2-isocyanato pyrimidine can be synthesized by the reaction of oxalyl chloride and 2-amino-4,6-dichloropyrimidine which can be obtained from 2-amino-4,6-dihydroxy pyrimidine. 相似文献
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1-氨基环烷基膦酸酯类化合物是一种新型高效植物生长调节剂[1],与某些化合物混合使用[2],不但可以作脱水、脱叶剂还可以用作除草剂,抑制杂草生长,为了进一步探索这类化合物的结构与活性关系,我们合成出4个新的1-氨基环己基取代苯基膦酸酯化合物,并讨论了反应机理. 相似文献
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D. M. Mondeshka Ch. N. Tancheva H. M. Angelov 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract Studies were performed on the reaction between alkyl- and arylselenyl chlorides with esters of allenic phosphonic acids, variously substituted at their terminal C-atom. With the esters of the C-3 diasubstituted acids the reaction is highly regioselective and only oxaphosphol heterocyclization occurs to 2,5-dihydro-1,2-oxaphosphols 21-e. With the esters of the propadiene phosphonic acid the reaction is regio- and (Z)-stereoselective: only the 2,3-adducts 3a-b are formed, where the (Z)-isomer and the allenic phosphonates 4a-b are prevalent, as a result of 1,3-sigmatropic isomerization of 3a-b. With the esters of the C-3 monosubstituted acids, complex reaction mixtures are formed. From them were isolated: (E)- and (Z)-isomers of 2,5-dihydro-1,2-oxaphosphols 2f-j; (E)-and (Z)-isomers of the 2,3-adducts 3c-h; (E)-and (Z)-isomers of 4c-f; and (E)-and (Z)-isomers of the 1,2-adducts 5a-d. The reaction partially loses its regioselectivity, but the (Z)-stereoselectivity is preserved: 相似文献
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Structurally variant bis(trimethylsilyl)alkyl phosphonates were converted in high yields (80–88%, distilled) to the corresponding phosphonyl dichlor-ides upon reaction with (COCl)2/DMF. 相似文献
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Petro P. Onys’ko Denys V. Klukovsky Andrii V. Bezdudny Volodymyr V. Pirozhenko Yurii M. Pustovit Anatoly D. Synytsya 《Phosphorus, sulfur, and silicon and the related elements》2014,189(7-8):1094-1101
AbstractA convenient synthetic approach for previously unknown N-(R-cyclopropyl)trifluoroacetimidoyl phosphonates 5a,b (R?H, CF3) was developed on the basis of the reaction of respective trifluoroacetimidoyl chlorides with triethyl phosphite. It was shown that imidoyl phosphonates 5a,b exist as equilibrium mixture of Z/E isomers (Z:E ~92:8). Activation parameters of Z–E isomerization were evaluated by 19F NMR spectroscopy. Catalytic hydrogenation of 5a,b can serve as a convenient method for the synthesis of trifluoroethylaminophosphonates with a rigid N-cyclopropyl group. 相似文献
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Darzens-type reaction of chloromethyl phosphonate with (S)-(+)-N-sulfinimines gave (Ss, 2S, 3R)-diethyl 3-aryl-2-N-(p-toluenesulfinyl)aziridinyl-phosphonate (3) in good yields. 相似文献
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Hobosyan N. G. Balyan K. V. Nersisyan H. S. Sargsyan H. B. Kobalyan V. M. Dashyan Sh. Sh. Nazaryan I. M. Paronikyan E. G. 《Russian Journal of General Chemistry》2019,89(8):1586-1590
Russian Journal of General Chemistry - The method of synthesis of fused thiopyridines via S-alkylation of the corresponding pyridine thiones with propargyl bromide has been elaborated. Fused enol... 相似文献
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