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Synthesis of new pyrido[4',3':4,5]thieno[2,3-d]-1,2,4-triazolo[3,4-c]pyrimidines and a 5,6-dihydro-1,2,4-triazolo[4",3":1',2']pyrido[4',3':4,5]thieno [2,3-d]-pyrimidine ring system. 2000

E K Ahmed, and A M Gohar, and M A Ameen
Department of Chemistry, Faculty of Science, El-Minia University, A. R. Egypt.

A series of substituted pyrido[4',3':4,5]thieno[2,3-d]-1,2,4-triazolo[3,4-c]pyrimidines 4-6, 8, pyrido[4',3':4,5]thieno[2,3-d]-1,2,4-triazolo[3,4-c]pyrimidines 11-13 and 5,6-dihydro-1,2,4-triazolo[4",3":1',2']pyrido[4',3':4,5]thieno[2,3-d] pyrimidines 16-19 have been synthesized from 3, 10 and 15 through the reaction with orthoesters and carbon disulphide, respectively.

UI MeSH Term Description Entries
D009682 Magnetic Resonance Spectroscopy Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING). In Vivo NMR Spectroscopy,MR Spectroscopy,Magnetic Resonance,NMR Spectroscopy,NMR Spectroscopy, In Vivo,Nuclear Magnetic Resonance,Spectroscopy, Magnetic Resonance,Spectroscopy, NMR,Spectroscopy, Nuclear Magnetic Resonance,Magnetic Resonance Spectroscopies,Magnetic Resonance, Nuclear,NMR Spectroscopies,Resonance Spectroscopy, Magnetic,Resonance, Magnetic,Resonance, Nuclear Magnetic,Spectroscopies, NMR,Spectroscopy, MR
D011743 Pyrimidines A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.
D014230 Triazoles Heterocyclic compounds containing a five-membered ring with two carbon atoms and three nitrogen atoms with the molecular formula C2H3N3. Triazole

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Pyridine-based heterocycles. Synthesis of new pyrido [4',3':4,5]thieno[2,3-d]pyrimidines and related heterocycles.
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2,4-Diaminothieno(2,3-d)pyrimidines as antifolates and antimalarials. 2. Synthesis of 2,4-diaminopyrido(4',3':4,5)thieno(2,3-d)pyrimidines and 2,4-diamino-8H-thiopyrano(4',3':4,5)thieno(2,3-d)pyrimidines.
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[Synthesis and Neurotropic Activity of 2,4-pyrano[4',3':4,5]pyrido[2,3-b]thieno[3,2-d] Pyrimidines].
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