3-d] Pyrimidines
![Diversity oriented synthesis : substitution at C5 in unreactive pyrimidines by Claisen rearrangement and reactivity in nucleophilic substitution at C2 and C4 in pteridines and pyrido[2,3-d]pyrimidines](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==)
Diversity oriented synthesis : substitution at C5 in unreactive pyrimidines by Claisen rearrangement and reactivity in nucleophilic substitution at C2 and C4 in pteridines and pyrido[2,3-d]pyrimidines
... Pyrrolo[2,3- d]pyrimidines were the least reactive substrates requiring the use of neat amine as nucleophile and temperatures above 130 o C to effect substitution; 5, 23 this behaviour is ...
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← Return to Article Details EFFECTIVE MICROWAVE SYNTHESIS OF BIOACTIVE THIENO[2,3-d]PYRIMIDINES
... 2-amino- 3-cyano thiophenes, the reaction of (2a-2j) was carried out with formamide and urea under solvent free condition as shown in scheme 2, which yielded the novel thieno[2,3-d]pyrimidines ...
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STUDY OF THE ANTI TUMOR ACTIVITY OF SYNTHETIC PYRIDO [2,3 d]PYRIMIDINES, PYRIMIDINES AND CORRESPONDING CHALCONE DERIVATIVES
... pyrido[2,3-d] pyrimidines, 6a-g: A mixture of 2- amino-3-cyano-4,6-disubstituted pyridines (5a-k) ...pyrido[2,3-d] pyrimidines 27 (Scheme ...
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Synthesis of spiro pyrazolo[4′,3′:5,6]pyrido[2,3 d]pyrimidines using KF alumina catalyst
... :5,6]pyrido[2,3-d]pyrimidines 3 have wide applications as colorants [1], heat/ moisture resistant and thermaltransfer printing agents [2], as well as photographic couplers ...derivatives 3 by ...
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One-pot, four component synthesis of pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidines derivatives
... [4′,3′:5,6]pyrido[2,3-d] pyrimidines derivatives was successfully achieved via one-pot, four component reactions of β-aminocrotonitrile, phenyhydrazine, arylglyoxals, barbituric acid derivatives in ...
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12 Tungstophosphoric acid (H 3 PW 12 O 40 ): An efficient and reusable catalyst for one pot synthesis of pyrano[2,3 d ]pyrimidines
... the three-component cyclocondensation of 1,3-dimethylbarbituric acid, aryl aldehydes, and malononitrile, giving rise to pyrano[2,3-d]pyrimidines. The reactions occur in ethanol as solvent and furnish the ...
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Identification of 4-Amino-Thieno[2,3-d]Pyrimidines as QcrB Inhibitors in Mycobacterium tuberculosis
... and 3) and polar groups, such as hydroxyl (entry 4), had poor activity, FIG 1 CB37 and CB81 are 4-amino-thieno[2,3-d]pyrimidines that inhibit the growth of ...
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Design, Synthesis and Pharmacological Evaluation of New Nonsteroidal Anti Inflammatory Derived from 3 Aminobenzothieno[2,3 d]pyrimidines
... As a part of our continuing program on the synthesis of anti-inflammatory and analgesic compounds as therapeu- tics agents, we have earlier reported a series of hetero- cyclic moieties that have anti-inflammatory and ...
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The chemistry of pyrido[2,3 d]pyrimidines and their applications
... Hepatitis C virus (HCV) is a common pathogen that can lead to cirrhosis, hepatocellular carcinoma (HCC) and liver failure. There is still an urgent need for new HCV drugs with diverse modes of action. Thus, Krueger et ...
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Synthesis and biological evaluation of novel substituted pyrrolo[2,3-d]pyrimidines as anticancer agents
... pyrimidine have already been discovered as antitumor agents by the NCI (National Cancer Institute, Bethesda, MD) on HCT116 and other cell lines. Some pyrrolo[2,3-d]pyrimidines(1) structurally related with ...
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Synthesis of 2,3 disubstituted thieno(2,3 d)pyrimidines for antibacterial and pharmacological activity
... We have synthesized various substituted thieno(2,3-d)pyrimidines, first by synthesizing 2- aminothiophene-3-carboxamide(1), subsequently treating with chloroacetylchloride, 2- ...
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The Application of Arylglyoxals in the Synthesis of Pyrrolo[2,3-d]pyrimidines via Multicomponent Reactions
... This study presented an overview of the recent literature on application of the arylglyoxals for synthesis of the pyrrolo[2,3-d]pyrimidines via multicomponent reactions over the last decades. In the light ...
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Synthesis and antiviral activity of 1,3,4 oxadiazolyl selenopheno[2,3 d]pyrimidines as novel Bluetongue virus inhibitors
... As part of ongoing studies in developing new antiviral agents against Bluetongue Virus, a series of novel 1,3,4- oxadiazolyl selenopheno[2,3-d]pyrimidines bearing a choice of aromatic moieties with ...
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A green approach to electrosynthesis of chromeno[3’,4’:5,6] pyrano [2,3-d] pyrimidines
... Eletrochemistry is a broad, useful, and selective technique method in many research fields. Among them, the investigation of performance of electrochemical methods in determination, synthesis and selective ...
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Synthesis and Biological Studies of Trihydro Pyrido [2, 3-D] Pyrimidines 6 - Carbonitrile
... The synthesis of 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 ...
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Synthesis and biological evaluation of 3N substituted thieno[2,3 d] pyrimidines
... To counteract the resistance produced by microbes there is a need to invent new drugs, which are more safe and effective. In many cases heterocyclic fusion with pyrimidine ring resulted in compounds with wide spectrum of ...
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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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Nitriles in Heterocyclic Synthesis: Synthesis of Pyrido[3’,2’:4,5]Thieno[2,3 d] Pyrimidines Derivative
... Saponification of the amino ester 3a using alcoholic sodium hydroxide gave the sodium salt of the amino acid 4, which afforded ...
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Synthesis of Some Derivatives of the 4H-pyrido[4′,3′:5,6]pyrano[2,3-d]pyrimidines
... Particular interests from the point of view of medical chemistry are polycyclic structures containing as a substituent alkyl radicals with a tert-amino group. This can increase the lipophilicity of the final products, or ...
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Synthesis and Biological Studies of Pyrazolo [3, 4-d] Pyrimidines
... 14. A. Gangjee, A. Vidwans, E. Elzein, J. J. Mc Guire, S. F. Queener and R. L. Kisliuk, Synthesis,antifolate and antitumor activities of classical and nonclassical 2-amino-4-oxo- 5-substituted-pyrrolo[2,3-d] ...
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