共查询到20条相似文献,搜索用时 10 毫秒
1.
I. G. Tishchenko O. N. Bubel' V. A. Konovalov 《Chemistry of Heterocyclic Compounds》1981,17(7):705-710
The corresponding trans- and cis-1,2-dimethyl-4-aryl-5-aroyl-2-imidazolines were obtained from complexes of cis- and trans-1-methyl-2-aryl-3-aroylaziridines with BF3 by heating with acetonitrile. The reaction proceeds with inversion of the configuration of the starting 3-aroylaziridines. In the presence of bases the complexes of cis-1,2-dimethyl-4-aryl-5-aroyl-2-imidazolines readily undergo isomerization to the corresponding trans analogs. The structures of the products were established on the basis of the IR, PMR, and mass spectra and the results of elementary analysis. The configurations of the compounds were determined by means of the Overhauser nuclear effect.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 952–957, July, 1981. 相似文献
2.
O. N. Bubel' I. G. Tishchenko O. A. Grinkevich G. Z. Stasevich A. V. Shavnya 《Chemistry of Heterocyclic Compounds》1984,20(10):1076-1078
The reaction of trans-3-aryl-2-aroyloxiranes containing electron-acceptor substituents in the aryl group with acetone under acid-catalysis conditions gives the corresponding cis-1,3-dioxolanes.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1315–1317, October, 1984. 相似文献
3.
O. N. Bubel' I. G. Tishchenko G. Z. Stasevich I. L. Romanko A. F. Abramov E. D. Skakovskii 《Chemistry of Heterocyclic Compounds》1979,15(7):723-726
The reaction of 3-aryl-2-benzoyloxiranes with acetone in the presence of catalytic amounts of boron trifluoride etherate leads to the formation of mixtures of cis and trans isomers (3070) of 2,2-dimethyl-5-aryl-4-benzoyl-1,3-dioxolanes, the structures and stereochemistry of which were established on the basis of data from their PMR spectra, measurement of the Overhauser nuclear effect, and some chemical transformations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 888–891, July, 1979. 相似文献
4.
cis-2,2,3-Trimethyl-5-aryl-4-aroyloxazolidines were obtained by heating complex boron trifluoride salts of trans-1-methyl-2-aryl-3-aroylaziridines with acetone. The reaction of complex boron trifluoride salts of cis-1-methyl-2-aryl-3-aroyl-aziridines leads to substituted benzaldehydes and -N-methylaminoacetophenones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 38–42, January, 1981. 相似文献
5.
Russian Journal of General Chemistry - A series of new 1-aminocarbonylmethyl-5-aryl-4-aroyl-3-hydroxy-3-pyrrolin-2-ones has been synthesized through a three-component reaction of aroylpyruvic acid... 相似文献
6.
A. Lévai 《Monatshefte für Chemie / Chemical Monthly》1995,126(11):1245-1251
Summary 3-Aroyl-4-aryl-2-pyrazolines (21–40) have been synthesized by the reaction of ,-unsaturated ketones (1–20) with diazomethane. These 2-pyrazolines gave -methyl-,-unsaturated ketones (41–46) on thermal denitrogenation.Dedicated to Prof. Dr.F. Sauter on the occasion of his 65th birthday 相似文献
7.
O. G. Kulinkovich I. G. Tishchenko N. V. Masalov 《Chemistry of Heterocyclic Compounds》1984,20(12):1319-1321
The reaction of 1-aroyl-2,2-dichlorocyclopropanes with a mixture of potassium tertbutylate and potassium methylate (or ethylate) in tert-butyl alcohol gives 5-aryl-2-methoxy (or ethoxy) furanes in good yield.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1603–1605, December, 1984. 相似文献
8.
V. L. Gein I. V. Krylova E. P. Tsypliakova A. R. Gaifullina L. I. Varkentin M. I. Vakhrin 《Chemistry of Heterocyclic Compounds》2009,45(7):829-832
Methyl esters of 5-aroyl-6-aryl-2-oxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acids were synthesized from three component
mixtures of methyl esters of aroylpyruvic acids, urea, and substituted benzaldehydes. 8-Hydroxy-4,5-diphenyl-3,4-dihydropyrimido[4,5-d]pyridazin-2(1H)-one was synthesized by the reaction of 5-benzoyl-2-oxo-6-phenyl-1,2,3,6-tetrahydropyrimidin-4-carboxylate
with hydrazine hydrate. 相似文献
9.
The reaction of α-(aryl)-4-morpholineacetonitriles (masked aroyl anion equivalents) with N-protected 4(5)-bromo-5(4)-nitro-1H-imidazoles gave 4-aroyl-5-nitroimidazoles which were reduced to afford 4-aroyl-5-aminoimidazoles. 相似文献
10.
A series of 6-aroyl-4-oxohexanoic acids ( 2 ) was prepared for intermediate use by acid-catalyzed solvolysis of substituted 3-(2-furyl)acrylophenones ( 1 ). This reaction occasionally gave 5-aryl-2-furanpropionic acids ( 3 ) instead of, or in addition to, the desired diketones ( 2 ). Equilibrium between 2 and 3 was observed in the case where Ar is m-nitrophenyl. A rationalization for the formation of 3 is offered, and published reports with which our results differ are discussed. Diketones ( 2 ) were cyclized to furans ( 3 ) and antiinflammatory screening data are reported for the latter. 相似文献
11.
Ivana Sušnik Jasna Vorkapić-Furač Senadin Duraković Stanko Koprivanac Jasna Lasinger 《Monatshefte für Chemie / Chemical Monthly》1992,123(8-9):817-822
Summary The reaction of 3-aroyl-6-aryl-4-hydroxy-2H-pyran-2-ones (Ar=p-tolyl, 1,1-biphenyl-4-yl or thienyl) with aniline and substitutedo-phenylenediamine (R=H, CH3 or Cl) yields a series of new Schiff bases2a–f in 51–72% yield. Bromination of1a gave the 5-bromo derivative1c, while the compounds1a,1b,2b,2e, and2f were converted into 2,6-diaryl-4H-pyran-4-ones3a–c. All products have been fully characterized.
Synthese von Schiff'schen Basen von 3-Aroyl-6-aryl-4-hydroxy-2H-pyran-2-onen
Zusammenfassung Die Reaktion von 3-Aroyl-6-aryl-4-hydroxy-2H-pyran-2-onen (Ar=p-Tolyl, 1,1-Biphenyl-4-yl oder Thienyl) mit Anilin und substituierteno-Phenylendiaminen liefert neue Schiff'sche Basen2a–f/bd in 51–72% Ausbeute. Bromierung von1a gab das 5-Bromderivate1c, während die Verbindungen1a,1b,2b,2e und2f in 2,6-Diaryl-4H-pyran-4-onen3a–c übergeführt wurden. Alle Produkte wurden voll charakterisiert.相似文献
12.
13.
G. V. Tormoz V. Yu. Khodorkovskii O. Ya. Neiland 《Chemistry of Heterocyclic Compounds》1989,25(2):233-234
Translated from Khimiya Geterotsiklicheskih Soedinenii, No. 2, pp. 276–277, February, 1989. 相似文献
14.
Joseph G. Lombardino 《Journal of heterocyclic chemistry》1973,10(5):697-698
Several 2-aryl-4-phenyl-5-trifluoromethylimidazoles have been made from the previously unknown 1-phenyl-3,3,3-trifluoro-1,2-propanedione monohdyrate. One analog, 4-phenyl-2,5-bis(trifluoromethyl)imidazole, is quite acidic, exhibiting pKa 8.1. 相似文献
15.
The reaction of 1-aryl-2-(dimethylaminomethylene)butane-1,3-diones with diethyl oxalate in the presence of sodium hydride in THF gave ethyl 5-aroyl-4-oxo-4H-pyran-2-carboxylates, from which 4-oxo-6-aryl-4H-pyran-2-carboxylic acids (6-arylcomanic acids) were obtained in high yields via acid-catalyzed deformylative rearrangement. 5-Aroyl-4-oxo-4H-pyran-2-carboxylic acids (5-aroylcomanic acids) were prepared via а ring-opening/ring-closure sequence by the reaction of 5-aroyl-2-carbethoxy-4-pyrones with piperidine and subsequent basic hydrolysis and acidification. 相似文献
16.
T. I. Orlova S. P. Épshtein V. P. Tashchi A. F. Rukasov L. Ya. Bogel'fer Yu. G. Putsykin 《Chemistry of Heterocyclic Compounds》1986,22(4):451-455
Tsomeric 4- and 5-hydroxylaminothiazolidin-2-thiones were synthesized by the reaction of 1,2-aminosubstituted oximes with CS2, and of dimeric olefin nitrosochlorides with dithiocarbamate salts. These compounds react with aldehydes and ketones to form the respective nitrones. In contrast to the 5-derivatives, the 4-hydroxylamino derivatives hydrolyze to 4-hydorxythiazolidin-2-thiones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 549–553, April, 1986. 相似文献
17.
V. A. Lepikhin V. M. Petrichenko M. E. Konshin 《Chemistry of Heterocyclic Compounds》1986,22(10):1097-1099
In hydrolysis of 3-aroyl-6-methyl-2-methoxypyridines, 3-aroyl-6-methyl-2-oxopyridines are formed, which with methyl iodide in an alkaline medium give the corresponding 1-methyl derivatives.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1354–1356, October, 1986. 相似文献
18.
19.
[reaction: see text] An efficient route to 1-aroyl-3-aryl-4-substituted imidazole-2-thiones (2, 4-6) has been developed. The methodology involves the cyclization of 1-aroyl-3-arylthioureas with a variety of carbonyl compounds bearing alpha-H in the presence of bromine and triethylamine. 相似文献
20.
The reaction of 1,1,1-trichloro-3,3,3-trifluoroacetone with S-methyl-2-arylisothiosemicarbazides affords an unusual synthesis of 1-aryl-3-trifluoromethyl-5-methylthio-1,2,4-triazoles from which 1-aryl-3-trifluoromethyl-1,2,4(4H)-triazole-5-ones are obtained on treatment with base. 相似文献