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1.
Previously unknown 2-methoxy(or ethoxy)-4-(11-oxo-9-phenyl-7,8,9,10,11,12-hexahydrobenzo[b][4,7]phenanthrolin-12-yl)phenyl esters of carboxylic acids were prepared by ternary condensation of vanillin or vanillal alkanoates with 6-quinolylamine and Phenidone. According to the 1H NMR spectra, the target products are formed as mixtures of diastereomers. 相似文献
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E. A. Dikusar N. G. Kozlov N. A. Zhukovskaya K. L. Moiseichuk 《Chemistry of Natural Compounds》2004,40(2):180-183
Vanillin and vanillal oximes 2a and 2b were used to prepare the corresponding esters 3a-k, 4a-k, and 5a-c by reaction with acyl chlorides in the presence of pyridine. 相似文献
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Ernst Grigat 《Angewandte Chemie (International ed. in English)》1972,11(11):949-963
The reactions of cyanic esters with acylating agents and the reactions of the resulting N-acyliminocarbonic ester halides are surveyed, and syntheses of heterocycles with cyanic esters and their reaction products are then reported. 相似文献
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E. A. Dikusar 《Russian Journal of General Chemistry》2005,75(12):1939-1945
Vanillin and vanillal esters were reacted with 4-bromoaniline and 1-bromo-2-naphthylamine in methanol to obtain the corresponding halogen-containing azomethines. 相似文献
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Khudina O. G. Shchegol’kov E. V. Burgart Ya. V. Saloutin V. I. 《Russian Journal of Organic Chemistry》2004,40(6):813-817
Polyfluorinated 2-arylhydrazono-3-oxocarboxylic acid esters react with o-phenylenediamine in neutral medium to give mainly the corresponding o-aminoanilides which can be converted into 1,5-benzodi-azepin-2-ones. In the reactions with ethyl 2-arylhydrazono-3-oxobutanoate and its 4,4-di- and 4,4,4-trifluoro derivatives, ethyl 2-(2-benzimidazolyl)-2-[(4-methylphenyl)hydrazono]ethanoate is also formed. 相似文献
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Il'yas S. Nizamov Nailya G. Galimullina Il'nar D. Nizamov Tat'yana P. Sorokina Yan E. Popovich Elvira S. Batyeva 《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2415-2424
The reactions of S-trimethylsilyl esters of dithiophosphoric, diamidodithiophosphoric, aryldithiophosphonic, aryltrithiophosphonic, and arylamidodithiophosphonic acids with diethyl acetal of benzaldehyde and ortho formiate and acetate were studied. On the basis of these studies, new derivatives of tetracoordinated phosphorus thioacids were obtained. 相似文献
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Sodium cyanide in hexamethylphosphoric triamide selectively cleaves methyl esters in the presence of ethyl esters with yields of ca. 80%. The mechanism of the reaction has been investigated. It consists of nucleophilic displacement by cyanide of the carboxylate ion from the alcohol carbon atom (BAl2 mechanism). 相似文献
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In 1963, it was found that sterically unhindered esters of cyanic acid, which had previously been considered unobtainable, could be easily prepared from phenols and cyanogen halides. Another synthesis, involving the thermolysis of thiatriazole derivatives, was discovered in 1964. The aryl cyanates in particular have since been found to have many uses as starting materials for the preparation of numerous new classes of compounds [e.g. derivatives of esters of imidocarbonic acid (esters, amides, imides, hydrazides, hydroxylamides, sulfamides, sulfhydrazides, semicarbazides); esters of imidocarboxylic acids; s-triazines, pyrimidines, tetrazoles, triazoles, triazolones, oxadiazoles, thiadiazoles, benzoxazinones, etc.], mainly by addition of nucleophilic or 1,3-dipolar reactants, or as aids e.g. in the elimination of H2O or H2S or in the transfer of CN groups. 相似文献
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Kana Kunihiro Dr. Svetlana Heyte Prof. Dr. Sébastien Paul Dr. Thierry Roisnel Prof. Dr. Jean-François Carpentier Dr. Evgueni Kirillov 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(12):3997-4003
A series of in situ-prepared catalytic systems incorporating RuII precursors and bidentate phosphine ligands has been probed in the reductive carboxylation of ethylene in the presence of triethylsilane as reductant. The catalytic production of propionate and acrylate silyl esters was evidenced by high-throughput screening (HTS) and implemented in batch reactor techniques. The most promising catalyst systems identified were made of Ru(H)(Cl)(CO)(PPh3)3 and 1,4-bis(dicyclohexylphosphino)butane (DCPB) or 1,1’-ferrocene-diyl-bis(cyclohexylphosphine) (DCPF). A marked influence of water on the acrylate/propionate selectivity was noted. Turnover numbers [mol mol(Ru)−1] up to 16 for acrylate and up to 68 for propionate were reached under relatively mild conditions (20 bar, 100 °C, 0.5 mol % Ru, 40 mol % H2O vs. HSiEt3). Possible mechanisms are discussed. 相似文献
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Volʼeva V. B. Komissarova N. L. Kurkovskaya L. N. Ovsyannikova M. N. Ryzhakova A. V. 《Russian Journal of Organic Chemistry》2020,56(3):538-539
Russian Journal of Organic Chemistry - A new reaction of triethyl orthoformate with ethyl butyrate has been revealed. It afforded diethoxymethyl butanoate and its hydrated form,... 相似文献
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Aldolic condensations with 0-ethyl thioesters are performed on basic alumina to give 2,3-unsaturated thioates. The stereochemistry of the reaction is discussed and compared with Knoevenagel's, Pinner's and Wittig-Horner's reactions. 相似文献
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The reaction of carboxymethyl polysaccharides and their ethyl esters with amines was studied with the aim to determine how the structure of the polymeric acylating agent affects the composition of the reaction products. 相似文献
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Esters Derived from Vanillin and Vanillal and Aromatic and Functionalized Aliphatic Carboxylic Acids
Reactions of vanillin and vanillal with aromatic and functionally substituted aliphatic carboxylic acid chlorides in the presence of pyridine afforded the corresponding previously unknown esters.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 7, 2005, pp. 1015–1019.Original Russian Text Copyright © 2005 by Dikusar, Kozlov. 相似文献
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Kozlov N. G. Gusak K. N. Tereshko A. B. Dikusar E. A. 《Russian Journal of Organic Chemistry》2004,40(5):705-710
Condensation of vanillin esters of aliphatic acids with 6-aminoquinoline and cyclic c-diketones (1,3-cyclohexanedione and dimedone) afforded new 2-methoxy-4-(11-oxo-7,8,9,10,11,12-hexahydrobenzo[b][4,7]phenanthrolin-12-yl)phenyl esters of carboxylic acids. 相似文献
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Dmitry S. Yufit Judith A. K. Howard 《Acta Crystallographica. Section C, Structural Chemistry》2011,67(3):o104-o106
Crystals of cyclopentanone, C5H8O, and cyclobutanone, C4H6O, have been grown in situ on a diffractometer. The two compounds are isostructural and contain two crystallographically independent molecules. Molecules sitting across twofold axes form antiparallel dipole–dipole dimers, while other molecules in general positions are linked together into ribbons by pairs of C—H...O interactions. 相似文献
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