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31.
Chloroarylation of unsaturated compounds with arenediazonium chlorides in the presence of CuCl2 as catalyst involves intermediate formation of arenediazonium tetrachlorocuprates(II) [ArN2
+]2 CuCl4
2-. A procedure for preparative isolation of these intermediates was developed, and they were shown to be efficient arylating agents. Reactions of [ArN2
+]2 CuCl4
2- with unsaturated compounds gave the corresponding Meerwein products; a mechanism was proposed for these reactions. In polar solvents arenediazonium tetra- chlorocuprates(II) are converted into chloroarenes, presumably through a cyclic transition state. 相似文献
32.
N. D. Obushak Yu. I. Gorak V. S. Matiichuk R. Z. Lytvyn 《Russian Journal of Organic Chemistry》2008,44(11):1689-1694
Reaction of 2-acetylfuran with arenediazonium chlorides under Meerwein reaction conditions led to the formation of 5-aryl-2-acetylfurans. The bromination of these compounds gave 2-bromo-1-(5-aryl-2-furyl)-ethanones that reacted with 4-amino-4H-5-R-1,2,4-triazole-3-thiols to form 3-R-6-(5-aryl-2-furyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines. 相似文献
33.
N. D. Obushak N. T. Pokhodylo N. I. Pidlypnyi V. S. Matiichuk 《Russian Journal of Organic Chemistry》2008,44(10):1522-1527
5-Substituted 2-(1-aryl-5-methyl-1H-1,2,3-triazol-4-yl)-1,3,4-oxadiazoles were synthesized by reaction of 1-aryl-5-methyl-1H-1,2,3-triazole-4-carbonyl chlorides with the corresponding 5-substituted 1H-tetrazoles. 5-Methyl-1-phenyl-1H-1,2,3-triazole-4-carbonyl chloride reacted with N′-hydroxybenzimidamides to give 3-aryl-5-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)-1,2,4-oxadiazoles. Reactions of 4-(5-methyl-1H-1,2,3-triazol-1-yl)benzoic acid with N′-hydroxybenzimidamides resulted in the formation of 3-aryl-5-[4-(5-methyl-1H-1,2,3-triazol-1-yl)phenyl]-1,2,4-oxadiazoles. 相似文献
34.
35.
Yu. V. Ostapiuk V. S. Matiichuk N. I. Pidlypnyi N. D. Obushak 《Russian Journal of Organic Chemistry》2012,48(4):519-522
A simple and convenient procedure was proposed for the synthesis of 4-aryl-3-bromobutan-2-ones from methyl vinyl ketone and
arenediazonium bromides under Meerwein reaction conditions. 相似文献
36.
V. S. Matiichuk M. A. Potopnyk N. D. Obushak 《Russian Journal of Organic Chemistry》2009,45(5):712-718
The reaction of ethyl 4-formyl-1-phenyl-1H-pyrazole-3-carboxylate with the malonic acid led to the formation (2E)-3-(3-ethoxycarbonyl-1-phenyl-1H-pyrazol-4-yl)propenic acid. In reactions of this acid chloride with 4-amino-5-aryl(hetaryl)-4H-1,2,4-triazole-3-thiols were obtained ethyl 4-[(E)-2-{3-aryl(hetaryl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-6-yl}ethenyl]-1-phenyl-1H-pyrazoe-3-carboxylates, with 5-aryltetrazoles, ethyl 4-[(E)-2-(5-aryl-1,3,4-oxadiazol-2-yl)-ethenyl]-1-phenyl-1H-pyrazole-3-carboxylates, with 1-(2-hydroxy-3,5-dimethylphenyl) followed by the Baker-Venkataraman rearrangement and the cyclization, ethyl 4-[(E)-2-(6,8-dimethyl-4-oxo-4Hchromen-2-yl)ethenyl]-1-phenyl-1H-pyrazole-3-carboxylate. 相似文献
37.
V. S. Matiichuk M. A. Potopnyk N. D. Obushak 《Russian Journal of Organic Chemistry》2010,46(10):1550-1557
Bromination of ethyl 1-aryl-4-acetyl-5-methyl-1H-pyrazole-3-carboxylates gave ethyl 1-aryl-4-(bromoacetyl)-5-methyl-1H-pyrazol-3-carboxylates which were used to alkylate benzenethiol and heterocyclic thiones at the sulfur atom. Reactions of
the resulting S-alkylation products with hydrazine or methylhydrazine involved closure of pyridazine ring to afford 2-aryl-3-methyl-4-[phenyl(or
hetaryl)sulfanylmethyl]-6,7-dihydro-2H-pyrazolo[3,4-d]pyridazin-7-ones. 相似文献
38.
Russian Journal of Organic Chemistry - 相似文献
39.
N. G. Kozlov Yu. D. Zhikharko R. Z. Lytvyn Yu. I. Gorak E. D. Skakovskii A. V. Baranovskii L. I. Basalaeva M. D. Obushak 《Russian Journal of Organic Chemistry》2014,50(6):833-839
Three-component condensation of naphthalen-2-amine with 5-arylfuran(thiophene, N-methylpyrrole)-2-carbaldehyde and 5,5-dimethylcyclohexane-1,3-dione, as well as condensation of N-[(5-arylfuran(thiophen)-2-ylmethylidene]naphthalen-2-amine with 5,5-dimethylcyclohexane-1,3-dione gave the corresponding 12-[5-arylfuran(thiophen, N-methylpyrrol)-2-yl]-7,8,9,10-tetradrobenzo[a]acridin-11(12H)-ones. 相似文献
40.
Substituted 1H-1,2,3-triazole-4-carboxylic acids were synthesized by a three-component reaction of arylazides, ethyl 4-chloro-3-oxobutanoate, and either O- or S-nucleophiles in the presence of a base catalyst. The reaction most probably proceeded as a [3 + 2] cyclocondensation reaction between arylazide and ethyl 4-chloro-3-oxobutanoate with the further nucleophilic substitution of chlorine in the chloromethyl group. Reaction optimization was performed to carry out the reaction with an O-nucleophile. Conditions were found under which diethyl 2,5-dihydroxyterephthalate (the product of self-condensation of two molecules of ethyl 4-chloro-3-oxobutanoate with the further oxidation by azide) was obtained. 相似文献