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RISSynthesis of Oxazolo[5,4-d][1,2,4]triazolo[4,3-a]pyrimidines as a New Class of Heterocyclic Compounds
Several new derivatives of oxazolo[5,4-d]pyrimidine (3a–h) have been synthesized through the reaction
of 2,4-dichloro-6-methyl-5-nitropyrimidine (2) with aryl carboxylic acids in refluxing POCl. Further treatment of ...
Synthesis of novel derivatives of (benz)imidazo[2,1-b]pyrimido[4,5-d][1,3] thiazine
Several derivatives of the novel heterocyclic systems 2-substituted-imidazo- and benzimidazo-[2,1-b]pyrimido[4,5-d][1,3]thiazine have
been synthesised through the one-pot cyclocondensation of 2,4-dichloro-5-(chlor ...
مزایای آموزش و ارتباط صنعت با دانشگاه
ارتباط صحیح و کامل بین صنعت، آموزش و پرورش و دانشگاه کلید اصلی رشد و پیشرفت جوامع در دنیای
امروز می باشد جامعه ایران به عنوان جامعهای در حال توسعه نیازمند رشد و توسعهای متوازن و هماهنگ است
تا با هماهنگی بین ...
َ A novel synthesis of chiral triazolo peteridine heterocyclic systems by using amino acids
A novel synthesis of chiral triazolo peteridine heterocyclic systems by using amino acids were described
An alternative approach to the synthesis of new pyrimido[5′,4′:5,6][1,4] thiazino[2,3-b]quinoxaline derivatives
An alternative approach to the synthesis of a series of new pyrimido[5′,4′:5,6][1,4]thiazino[2,3-b]quinoxaline derivatives is described. Reaction of 5‑bromo-2,4-dichloro-6-methylpyrimidine and 3‑aminoquinoxaline-2-thiol ...
Synthesis of pyrimido [4′,5′:5,6] [1,4] dithiepino [2,3- b] quinoxalines: Derivatives of a novel seven membered ring system
A convenient and efficient procedure for the synthesis of tetracyclic dithiepin derivatives is described
through the condensation reaction of 2,4-dichloro-5-(chloromethyl)-6- methylpyrimidine and quinoxaline-
< ...
Pyrimidooxadiazine and Triazolopyrimidooxadiazine Derivatives: Synthesis and Cytotoxic Evaluation in Human Cancer Cell Lines
In vitro antiproliferative activities of some pyrimido[4,5e][1,3,4]oxadiazine and [1,2,4]triaz olo[4',3':1,2]pyrimido[4,5 e][1,3,4]oxadiazine derivatives were examined in human malignant cancer cell lines. All synthesized ...
Synthesis of [1,2,4]triazolo[3,4-b]pteridines as a novel class of heterocyclic compounds
A series of pteridine derivatives have been synthesised through intramolecular cyclisation of 2,4-dichloro-6-methyl-5-nitro pyrimidine with various esters of amino acids. The subsequently reaction of pteridines with hydrazine ...
Synthesis of dihydrobenzo[b]pyrimido[4,5-e][1,4]thiazepines; derivatives of a novel ring system
Several derivatives of the novel dihydrobenzo[b]pyrimido[4,5-e][1,4]thiazepine ring system have been synthesised through the initial
heterocyclisation of 2,4-dichloro-5-(chloromethyl)-6-methylpyrimidine with ...
Synthesis of 2-substituted-4-methyl-5,13- dihydropyrimido[4',5':5,6][1,4]thiazepino[2,3- b]quinoxaline as a new heterocyclic system
2-Substituted-4-methyl-5,13-dihydropyrimido[4',5':5,6][1,4]thiazepino[2,3-b]quinoxalines
(7a-g), derivatives of a new heterocyclic system were synthesized through cyclocondensation of 2,4-dichloro-5-(chloromethyl) ...