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1.
Synthetic approaches to 3-substituted-7-ethyl-4,7-dihydro-4-oxoisoxazolo[5,4-b]pyridine-5-carboxylic acid derivatives from 3-substituted-5-aminoisoxazoles are reported. 相似文献
2.
7-Ethyl-4,7-dihydro-4-oxo-2-(4-pyridinyl)thieno[2,3-b]pyridine-5-carboxylic acid ( 4 ), an analog of nalidixic acid, was synthesized in seven steps starting from commercially available 4-methylpyridine. Bacterial susceptibility to compound 4 was tested and the title compound was found to exhibit only weak antibacterial activity against a variety of pathogens including S. Aureus, E. Coli and P. Aeruginosa. 相似文献
3.
Synthetic approaches to 1-benzyl-7-alkyl-2,3-dimethyl-4,7-dihydro-4-oxopyrrolo[2,3-b]pyridine-5-carboxylic acids from 1-benzyl-2-amino-3-t-butoxycarbonyl-4,5-dimethylpyrrole are reported. 相似文献
4.
A series of twelve newly synthesized derivations of 3-benzoyl-4,7-dihydro-7-oxopyrrolo[3,2-b]pyridine-6-carboxylic acid from 2-methyl-3-benzoyl-4-aminopyrrole is reported. 相似文献
5.
A. A. Krauze Z. A. Bomika Yu. É. Pelcher I. B. Mazheika G. Ya. Dubur 《Chemistry of Heterocyclic Compounds》1982,18(4):385-390
3-Oxoisothiazolo[5,4-b]pyridines were synthesized for the first time by the reaction of 3-cyanopyridine-2-thiones or bis(3-cyanopyridyl) disulfides with concentrated sulfuric acid. It is demonstrated that 3-carbamoylpyridine-2-thiones are formed as intermediates. The 3-oxoisothiazolopyridines were converted to 3-bromoisothiazolopyridines and pyridine-2-thiones. The bromination of pyridine-2-thione was studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 508–512, April, 1982. 相似文献
6.
A. Monge V. Martinez-Merino E. Fernandez-Alvarez 《Journal of heterocyclic chemistry》1985,22(5):1353-1356
Starting with 2-chloro-3-pyridinecarboxylic acid 1 , three different routes to prepare 3-oxoisothiazolo-[4,5-b]pyridines 10 were studied. 相似文献
7.
C. D. Weis 《Journal of heterocyclic chemistry》1978,15(1):29-30
Oxidation of 3-hydroxy-6-methyl-2-hydroxymethylpyridine with manganese dioxide yielded the corresponding aldehyde, the condensation of which with diethyl bromomalonate furnished hydroxydihydrofuro[3,2-b]pyridinediearboxylie acid ester. Saponification of the diester with concentrated hydrochloric acid afforded the hydrochloride of 5-methylfuro[3,2-b]pyrjdine car-boxylic acid. 相似文献
8.
Said M. Bayomi Kenneth E. Price J. Walter Sowell 《Journal of heterocyclic chemistry》1985,22(3):729-734
A route for the synthesis of various derivatives of 1,4-dihydro-4-oxopyrrolo[3,4-b]pyridine-3-carboxylic acid from 2-phenyl-3-amino-4-t-butoxycarbonyl-5-methylpyrrole hydrochloride is reported. 相似文献
9.
10.
J. M. Ruxer C. Lachoux J. B. Ousset J. L. Torregrosa G. Mattioda 《Journal of heterocyclic chemistry》1994,31(2):409-417
To check the antibacterial potential of two families of aza analogues of the quinolones, 1,4-dihydro-4-oxopyrrolo[1,2-b]pyridazine-3-carboxylic acids and 1,4-dihydro-4-oxoimidazo[1,5-b]pyridazine-3-carboxylic acids, we have prepared a few derivatives in theses families using N-aminopyrrole and N-aminoimidazole derivatives as starting building blocks and the classical pathways of the quinolone series. The compounds showed no interesting antibacterial activity. 相似文献
11.
I. V. Zavarzin N. G. Smirnova V. N. Yarovenko M. M. Krayushkin 《Russian Journal of Organic Chemistry》2006,42(2):273-274
A convenient procedure was developed for preparation of thiazolo[5,4-b]pyridine-2-carboxamides by oxidation of monothiooxamides synthesized from 3-aminopyridine. 相似文献
12.
Andrii Lozynskyi Borys Zimenkovsky Iryna Ivasechko Julia Senkiv Andrzej Gzella Olexandr Karpenko 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):1149-1157
AbstractThe synthesis and anticancer activity evaluation of new thiazolo[4,5-b]pyridine-5-carboxylic acid amides is described. The structures of the synthesized compounds were confirmed by spectroscopic data and a single crystal X-ray diffraction analysis for 2.4. The synthesized compounds were screened for their in vitro anticancer activity according to US NCI protocols. The most active 7-(4-fluorophenyl)-2-oxo-2,3-dihydrothiazolo[4,5-b]pyridine-5-carboxylic acid (4-chlorophenyl)amide 2.2 and 7-(4-chlorophenyl)-2-oxo-2,3-dihydrothiazolo[4,5-b]pyridine-5-carboxylic acid (4-chlorophenyl)amide 2.5 were screened for their cytotoxicity effects on C6 Rat glioma cells and U373 Human glioblastoma astrocytoma cells which revealed promising results comparable to temozolamide as reference control according MTT assay data. 相似文献
13.
14.
Thomas J. Schwan Raymond Freedman Jay R. Pollack 《Journal of heterocyclic chemistry》1983,20(5):1351-1353
The preparation, structure elucidation and antibacterial activity of 6-ethyl-6,9-dihydro-9-oxopyrazolo-[3,4-f]quinoline-8-carboxylic acid are reported. 相似文献
15.
Said M. Bayomi Khalid A. Al-Rashood 《Monatshefte für Chemie / Chemical Monthly》1991,122(8-9):725-730
Summary A synthetic approach to new 1-benzyl-7-alkyl-2,3-dimethyl-4-oxopyrrolo[2,3-b]pyridine-5-carboxylic acids using 5,6-dimethyl-2,4-dioxopyrrolo[2,3-d][1,3]oxazine as the starting material is reported. The antimicrobial activity of these compound is reported.
Synthese von Pyrrolo[2,3-b]pyridin-5-carbonsäure-Derivaten als potentielle antimikrobielle Substanzen
Zusammenfassung Die Synthese von neuen 1-Benzyl-7-alkyl-2,3-dimethyl-4-oxopyrrolo[2,3-b]pyridin-5-carbonsäuren durch Verwendung von 5,6-Dimethyl-2,4-dioxopyrrolo[2,3-d][1,3]oxazinen als Ausgangsmaterial wird beschrieben. Die antimikrobielle Aktivität dieser Substanzen wurde geprüft.相似文献
16.
B. A. Vigante Ya. Ya. Ozols G. Ya. Dubur E. M. Belash Yu. I. Beilis 《Chemistry of Heterocyclic Compounds》1984,20(2):170-176
Methods for the synthesis of 1,4-dihydropyridine-3,5-di- and 4-aryl-5-oxo-4,5-dlhydro-1H-indeno[1,2-b]pyridine-3-carbothionic acid ethyl esters were developed. A comparative analysis of the physicochemical characteristics of this series of substances is given.Their reactivities in electrochemical and chemical oxidation reactions were studied. The electrochemical oxidation potentials of the thionic acid esters are found in a lower anodic range as compared with their oxygen analogs. According to the ionization constants, the thionic acid esters of 4,5-dihydroindenopyridines are stronger acids than the carbonyl esters; this is explained by participation of the free 3d orbitals of the sulfur atom in stabilization of the anion.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No.2, pp. 210–216, February, 1984. 相似文献
17.
A. A. Krauze é. é. Liepin'sh Yu. é. Pelcher G. Ya. Dubur 《Chemistry of Heterocyclic Compounds》1987,23(1):102-106
The alkylation of piperidinium salts of substituted 1,4-dihydropyridine-2-thiols with chloroacetonitrile or iodoacetamide gave 2-cyanomethylthio- and 2-carbamoylmethylthio-substituted 6-methyl-4-aryl(pyridyl)-5-ethoxycarbonyl-3-cyano-1,4-dihydropyridines, which undergo intramolecular cyclization in basic media to give 3-amino-6-methyl-4-aryl(pyridyl)-5-ethoxycarbonyl-2-cyano(carbamoyl)-4,7-dihydrothieno[2,3-b]pyridines.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 124–128, January, 1987. 相似文献
18.
A. Monge J. A. Palop P. Parrado C. Perez-Ilzarbe E. Fernndez-Alvarez 《Journal of heterocyclic chemistry》1987,24(2):437-439
Starting with ethyl 3-aminoindole-2-carboxylate, the synthesis of 3-amino-5H-pyrimido[5,4-b]indole-2,4-dione 5 , 3-amino-5H-pyrimido[5,4-b]indol-4-one 10 and some related compounds is described. Preliminary results about the inhibition of platelet aggregation by these compounds is reported. 相似文献
19.
Iradj Lalezari 《Journal of heterocyclic chemistry》1979,16(3):603-604
2-Amino-3-cyanothiophenes were reacted with ethyl aminocrotonate in the presence of catalytic amounts of p-toluensulfonic acid. The intermediates 2-[N-(3′-ethoxycarbonyl-2′-propenylamino]-3-cyanothiophenes obtained were cyclized with sodium ethoxide to give the desired ethyl 4-aminothieno[2,3-b] pyridine-5-carboxylate. Hydrolysis of the latter aminoesters afforded 4-aminothieno[2,3-b]pyridine-5-carboxylic acid. The overall yields were about 80%. 相似文献
20.
Reaction of N-arylamides of acetoacetic acid with aromatic aldehyde and 3-amino-1,2,4-triazole derivatives has resulted in N,7-diaryl-5-methyl-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidine-6-carboxamides. 相似文献