Pyrido [2
![A convenient synthesis and characterization of 1,2 dihydrpyridine 2 one, pyrido[2,3 d]pyrimidine and thieno [3,4 c]pyridine derivatives](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==)
A convenient synthesis and characterization of 1,2 dihydrpyridine 2 one, pyrido[2,3 d]pyrimidine and thieno [3,4 c]pyridine derivatives
... Cyanoacetanilide (1) was reacted with aminocrotonitrile to give the corresponding 1,2- dihydropyridine (3). Also, 4,6-dimethyl-2-oxo-6-1,2-dihydro-pyridine-3-carbonitriles (7) was synthesized and subjected to some ...
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The chemistry of pyrido[2,3 d]pyrimidines and their applications
... ] pyrido[2,3-d]pyrimidine-2,4-dione 63 (linear structure) and hexahydrocyclohepta[4,5]pyrido[2,3-d]pyrimidine-2,4-dione 64 (angular structure) via a three-component one pot reaction of cycloheptanone, ...
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Approaches towards the synthesis of a novel class of 2-amino-5-arylazonicotinate, pyridazinone and pyrido[2,3-d]pyrimidine derivatives as potent antimicrobial agents
... arylhydrazonals 2 generally decreased the inhibitory effects while trans- formation of the latter into the corresponding 2- amino-5-arylazo-6-aryl substituted nicotinates 8 or the pyridazinone 10 resulted ...
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Synthesis and bioassay studies of 7 substituted pyrido[2,3 d]pyrimidines
... afforded corresponding 7-Substituted pyrido[2,3-d]pyrimidine derivatives 3a-j. Their chemical structures were characterized using IR, H 1 NMR and Mass spectral studies. All the above compounds were screened for ...
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Crystal structures of 2,3 bis(thiophen 2 yl)pyrido[2,3 b]pyrazine and 7 bromo 2,3 bis(thiophen 2 yl)pyrido[2,3 b]pyrazine
... 2,3-dithienyl-substituted pyrido[2,3-b]- pyrazines are interesting ligands related to their quinoxaline analogs since they have an additional heterocyclic nitrogen ...
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Synthesis and Biological Studies of Trihydro Pyrido [2, 3-D] Pyrimidines 6 - Carbonitrile
... 5-amino-4-aryl-7-oxo-2-mercato-4,8,4a-trihydro pyrido [2,3-d]pyrimidines-6-carbonitrile (VIIIa-m) have been undertaken by the condensation of 4-amino -5-cyano-6-aryl-2-mercato-5,6-dihydro pyrimidines ...
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Synthesis and Anti Cancer Activity of Pyrido[2,3-c]Pyridazine Derivatives
... N-1-propargyl pyrido[2,3- c]pyridazine-3-carboxylic acid ...propargyl pyrido[2,3-c]pyridazine-3-carboxamide deri- vatives (8-14) as shown in Table 1 ...
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6 (2,6 Dimethylphenyl)pyrido[2,3 d]pyrimidin 7 amine
... For the structures of related pyrido[2,3-d]pyrimidine deriva- tives, see: Hamby et al. (1997); Trumpp-Kallmeyer et al. (1998). For the synthesis of the title compound, see: Bennett et al. (1981); Blankley & ...
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STUDY OF THE ANTI TUMOR ACTIVITY OF SYNTHETIC PYRIDO [2,3 d]PYRIMIDINES, PYRIMIDINES AND CORRESPONDING CHALCONE DERIVATIVES
... Substituted pyrido[2,3-d] pyrimidines, 6a-g: A mixture of 2- amino-3-cyano-4,6-disubstituted pyridines (5a-k) ...corresponding pyrido[2,3-d] pyrimidines 27 (Scheme ...
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Synthesis of some new derivatives of N phenyl 2 chloro 9H pyrido[2,3 b]indole 3 ylmethanimines using Vilsmeier–Haack reagent
... indolamine after the acquisition of a group methyl- ketone (1) , gave the fused pyridine ring by cyclization and a free aldehyde group is made (2) . Finally , after using aryl-amine derivatives one type, made ...
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Green Synthesis and Antibacterial Activity of Pyrido[2,3-e]1,3,4-Oxadiazine Derivatives
... The antibacterial activity was achieved by testing the Pyrido[2,3-e]1,3,4-Oxadiazines derivatives, 3a-g against Escherichia Coli, Pseudomonas, Serratia and Bacillus Cereus, Table 1. Almost, all tested compounds ...
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Microwave Assisted Synthesis of Pyrido [2,3,4-kl]Acridines Unit of Some Marine Alkaloids via Nitrene Insertion
... tetracyclic pyrido [2,3,4- kl]acridine system 1 ...activities. 2 Microwave irradiation is well known for its ability to reduce reaction times dramatically, to increase product yields, and to enhance product ...
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DISCOVERY OF SUBSTITUTED IMIDAZO [1, 2 c] PYRIDO [3, 2 e] PYRIMIDINE BASED DERIVATIVES AS NOVEL ANTI MICROBIAL AGENTS
... All chemical were purchased from Sigma Aldrich with purity not less than 99.9%. Analytical Thin Layer Chromatography (TLC) was carried out by using silica gel 60 F254 pre-coated plates. Visualization was accomplished ...
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In vitro and in vivo evaluation of antioxidant activity of ARIs: Benzothiadiazine and pyridothiadiazine derivatives
... and Pyrido[2,3-e]-[1,2,4]-Thiadiazine 1,1-Dioxide Derivatives, characterized by antioxidant activity combined with the ability to inhibit aldose reductase, represent an example of a multitarget approach to the ...
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Pyrido[3,4-d]pyrimidin-4(3H)-one metabolism mediated by aldehyde oxidase is blocked by C2-substitution.
... the pyrido[3,4-d]pyrimidin-4(3H)-one scaffold, which is consistent with literature reports showing AO- mediated nucleophilic attack of an oxygen atom on the electron deficient carbon atoms adjacent to nitrogen of ...
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PYRIMIDINE: ITS DIVERSE BIOLOGICAL ACTIVITIES AND METHODS OF SYNTHESIS
... accessible 2-aryl pyrido[2,3-d]pyrimidines were synthesized that possessed potent mGlu5 receptor antagonist activity of the 2arylpyrido[2,3d]pyrimidines studied, it appears that appropriate substitution at ...
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Synthesis and antimicrobial activity of 3 cyano 4 imino 2 (methylthio) 7 methyl 4H pyrido [1,2 a] pyrimidine derivatives
... with 2-amino 5-methyl pyridine 2 in N,N’-dimethyl formamide (DMF) and anhydrous potassium carbonate gives 3-cyano-4-imino-2-(methylthio)-7-methyl-4H-pyrido [1,2- a]pyrimidine ...
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[6 (Furan 2 yl) 7 nitro 2,3,4,6,7,8 hexahydro 1H pyrido[1,2 a]pyrimidin 9 yl](phenyl)methanone
... C6A 0.0256 (11) 0.0271 (13) 0.0260 (11) −0.0011 (10) 0.0036 (9) −0.0023 (9) C6B 0.0202 (11) 0.0378 (14) 0.0248 (11) 0.0030 (10) 0.0024 (9) −0.0013 (10) C7B 0.0244 (11) 0.0297 (13) 0.0273 (11) −0.0004 (10) 0.0057 (9) ...
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1,2,3,5a,6,11,12,14a Octahydro 9 methoxy 12 (2 methylprop 1 enyl) 5H,14H pyrrolo[1′′,2′′:4′,5′]pyrazino[1′,2′:1,6]pyrido[3,4 b]indole 5,14 dione
... MeOH (1:0–0:1), to yield seven fractions (F-1: 1.2 g; F-2: 2.4 g; F-3: 1.5 g; F-4: 2.2 g; F-5: 0.9 g; F-6: 1.1 g; F-7: 2.5 g). F-2, showing pronounced cytotoxic activity against the human nasopharyngeal ...
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8 (4 Chlorophenoxy) 7 (4 chlorophenyl) 1,2,5 trimethylthieno[2′,3′;2,3]pyrido[4,5 d]pyrimidin 6(7H) one
... The title compound was prepared according to the literature proce- dure (Zhou et al., 2005). Suitable crystals were obtained by evaporation of a methanol solution (m.p. > 573 K). Analysis calcu- lated for C 24 H 17 Cl ...
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