共查询到20条相似文献,搜索用时 15 毫秒
1.
V. L. Gein T. M. Zamaraeva O. S. Panova V. D. Belonogova 《Russian Journal of General Chemistry》2015,85(10):2299-2303
Reactions of alkyl aroylpyruvates with a mixture of aromatic aldehyde and 5-aminotetrazole led to the formation of alkyl 7-aryl-6-aroyl-4,7-dihydrotetrazolo [1,5-а] pyrimidine-5-carboxylates. 相似文献
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V. L. Gein L. F. Gein E. P. Tsyplyakova O. S. Panova 《Russian Journal of Organic Chemistry》2007,43(9):1382-1386
6-Acyl-7-aryl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-5-carboxylic acids and methyl 6-acyl-7-aryl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-5-carboxylates were synthesized by fusion of 4-aryl-2,4-dioxobutanoic acids and their methyl esters, respectively, with 1H-tetrazol-5-amine and aromatic aldehydes. The reaction of methyl 2,4-dioxopentanoate with 1H-tetrazol-5-amine and 2-fluorobenzaldehyde in boiling acetic acid gave methyl 6-acetyl-5-hydroxy-7-(2-fluorophenyl)-4,5,6,7-tetrahydrotetrazolo[1,5-a]pyrimidine-5-carboxylate. 相似文献
3.
V. L. Gein I. N. Vladimirov O. V. Fedorova A. A. Kurbatova N. V. Nosova I. V. Krylova M. I. Vakhrin 《Russian Journal of Organic Chemistry》2010,46(5):699-705
Alkyl 5-aryl-7-methyl-1,5-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylates were obtained by melting acetoacetic acid esters with 5-aminotetrazole and aromatic aldehyde. 相似文献
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Three-component condensation of diethyl 2-oxobutanedioate sodium salt with aromatic aldehydes and tetrazol-5-amine monohydrate afforded the corresponding diethyl 6-aryl-3,6-dihydrotetrazolo[1,5-a]pyrimidine-4,5-dicarboxylates. 相似文献
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V. L. Gein V. V. Mishunin E. P. Tsyplyakova M. I. Vakhrin P. A. Slepukhin 《Russian Journal of Organic Chemistry》2011,47(7):1077-1082
Fusion of methyl 4-(2-thienyl)-2,4-dioxobutanoate with 1H-tetrazol-5-amine monohydrate and aromatic aldehyde gave methyl 7-aryl-6-(2-thenoyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-5-carboxylates which reacted with an equimolar amount of hydrazine hydrate at 180–190°C under solvent-free conditions
to produce 9-aryl-8-(2-thienyl)-4,9-dihydrotetrazolo[1′,5′: 1,2]pyrimido[4,5-d]pyridazin-5(6H)-ones. 相似文献
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5-Aryl-1-methyl-1,2,3,4-tetrahydrobenzo[a]phenanthridines were synthesized by cascade heterocyclization of the corresponding substituted benzaldehydes with 2-methylcyclohexanone and naphthalen-2-amine in a polar solvent in the presence of hydrochloric acid. 相似文献
10.
L. M. Potikha A. R. Turelyk V. A. Kovtunenko 《Chemistry of Heterocyclic Compounds》2011,47(6):745-754
Fusion of 4-bromo-1,3-diphenyl-2-buten-1-ones (γ-bromodypnones) with 1,2-dimethyl-1H-benzimidazole and further treatment of
the reaction product with a base (morpholine) gives 7,9-diaryl-5-methyl5,10-dihydroazepino[1,2-a]benzimidazol-11-ium bromides. The reaction of γ-bromodypnone with 1-alkyl-2-methyl-1H-imidazoles in benzene at 25 °C gives
quaternary azolium salts. Upon heating their solutions in alcohol in the presence of K2CO3 the latter cyclize to 1-R-6,8-diaryl-1,5-dihydroimidazo[1,2-a]azepin-4-ium bromides or 1-R-6,8-diaryl-1H-imidazo[1,2-a]azepines
depending on the nature of the substituent in the benzene rings and the substituent at the N(1) atom of the imidazole. 相似文献
11.
M. V. Pryadeina Ya. V. Burgart V. I. Saloutin P. A. Slepukhin E. V. Sadchikova E. N. Ulomskii 《Russian Journal of Organic Chemistry》2009,45(2):242-247
Methods were developed of the synthesis of alkyl 2-hydroxy-2-fluoroalkyl-4-phenyl-1,2,3,4—tetrahydroimidazo-[1,5-a]pyrimidine-3-carboxylates and alkyl-5-hydroxy-2,7-diphenyl-5-fluoroalkyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-6-carboxylates by regioselective [3+3]-cycloaddition of 5-aminoimidazole or 5-aminopyrazole to alkyl 2-benzylidene-3-oxo-3-fluoroalkylpropionates at the fluoroacylvinyl fragment. 相似文献
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A. H. Kategaonkar S. B. Sapkal B. R. Madje B. B. Shingate M. S. Shingare 《Chemistry of Heterocyclic Compounds》2010,46(6):754-758
Some new 4,5-diphenyl-1H-imidazole derivatives were synthesized in good yields by treating various tetrazolo[1,5-a]quinolines with benzil and ammonium acetate in glacial acetic acid. 相似文献
13.
A. E. Amr N. A. A. Hafez K. A. Ali M. A. Al-Omar H. A. Ghabbour 《Russian Journal of General Chemistry》2016,86(8):1944-1947
2-Dimethylamino methylenechromanone 1 reacted with 4H-1,2,4-triazol-3-amine in acetic acid to give only one isolated product which was identified by X-ray study as 6H-chromeno[3,4-e][1,3,4]triazolo[2,3-a]-pyrimidine. The molecular structure of 3, C12H8N4O, was determined to be monoclinic, P21/c, a = 16.3875(5), b = 8.8378(3), c = 13.8392(5) Å, β = 101.190(1)°, V = 1966.22(11) Å3, Z = 8. 相似文献
14.
V. L. Gein T. M. Zamaraeva V. V. Mishunin V. P. Kotegov 《Russian Journal of General Chemistry》2016,86(2):286-290
Three-component reaction of methyl 2-furanoylpyruvate with an aromatic aldehyde and 5-aminotetrazole monohydrate has afforded methyl 6-aryl(hetaryl)-5-(2-furanoyl)-3,6-dihydrotetrazolo[1,5-a]-pyrimidine-4-carboxylates. Hypoglycemic activity of the prepared compounds has been studied. 相似文献
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G. P. Kutrov N. V. Kovalenko Yu. M. Volovenko 《Russian Journal of Organic Chemistry》2008,44(2):257-262
2-Cyanomethyl derivatives were obtained of imidazo[1,2-a]pyridine, imidazo[1,2-a]pyrimidine, and imidazo[2,1-b]thiazole, and their reactivity was investigated by an example of imidazo[1,2-a]pyridine: It was subjected to nitration, bromination, azo coupling and nitrosation. Acylation of the methylene group effected by amino acids esters with a subsequent addition of the amino group to the cyano group resulted in the formation of 5-amino-4-imidazo[1,2-a]-pyridin-2-yl-1-phenyl-1,2-dihydro-3H-pyrrol-3-one and 2-amino-1-ethyl-3-imidazol[1,2-a]pyridin-2-yl-4(1H)-quinolinone. 相似文献
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Mohammad Rahimizadeh Mehdi Pordel Mehdi Bakavoli Zahra Bakhtiarpoor Ala Orafaie 《Monatshefte für Chemie / Chemical Monthly》2009,140(6):633-638
Abstract New imidazo[4,5-a]acridone derivatives were synthesized from the rearrangement of 3H-imidazo[4′,5′:3,4]benzo[c]isoxazoles. New imidazo[4,5-a]acridines were obtained from the reaction of imidazo[4,5-a]acridones in boiling POCl3. All of these compounds exhibited antimicrobial activities comparable to streptomycin as reference drug.
Graphical abstract
相似文献
19.
E. V. Nosova G. N. Lipunova A. A. Laeva V. N. Charushin 《Russian Journal of Organic Chemistry》2005,41(11):1671-1677
Reactions of 2-aminothiazole, derivatives of 2-aminobenzothiazole and 2-aminobenzoimidazole with polyfluorobenzoyl chlorides gave rise to acylation products that at heating in the diphenyl ether formed fluoro-containing derivatives of thiazolo[3,2-a]-, benzothiazolo[3,2-a]-, and benzimidazo[3,2-a]quinazolinone. 相似文献
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N. M. Khalifa E. S. Nossier M. A. Al-Omar A. E. Amr 《Russian Journal of General Chemistry》2016,86(8):1948-1953
Series of novel substituted thioxopyrimidine and thiazolo[3,2-a]pyrimidine compounds that combine various heteroaryl rings have been synthesized via Biginelli one-pot three-component reaction and elucidated with chemical and spectral analysis. Several products were tested for their antimicrobial properties. 相似文献