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New Pyrazolo (new + pyrazolo)
Selected AbstractsChemInform Abstract: Molecular Iodine Promoted Synthesis of New Pyrazolo[3,4-d]pyrimidine Derivatives as Potential Antibacterial Agents.CHEMINFORM, Issue 23 2010Mehdi Bakavoli Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Synthesis and Antimicrobial Activity of Some New Pyrazolo[3,4-d]pyrimidines (IV) and Thiazolo[4,5-d]pyrimidines (VI).CHEMINFORM, Issue 30 2008J. D. Akbari Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Synthesis of New Pyrazolo[1,5-a]pyrimidines and Pyrazolo[3,4-b]pyridines.CHEMINFORM, Issue 51 2001Saleh M. Al-Mousawi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Comparison between the Photophysical Properties of Pyrazolo- and Isoxazolo[60]fullerenes with Dual Donors (Ferrocene, Aniline and Alkoxyphenyl)EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 13 2007Laura Perez Abstract Two series of new pyrazolo- and isoxazolo[60]fullerenes covalently linked to vinylenephenylene bearing ferrocene, dibutylaniline or dodecyloxyphenyl electron-donor groups attached in the periphery have been synthesized. The photophysical properties of these newly synthesized dual-donor,C60 derivatives have been investigated and compared by applying time-resolved fluorescence and nanosecond transient techniques in both polar and nonpolar solvents. Charge separation via the excited singlet state of C60 is more efficient in the pyrazolo-C60 triads than in the isoxazolo-C60 triads. It was found that the pyrazoline ring mediates charge separation as a result of the stronger electron-donating character of the nitrogen atom of the pyrazoline ring compared with the oxygen atom of the isoxazoline ring. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source] Synthesis of novel pyrazolo[3,4- d]pyridazine, pyrido[1,2- a]benzimidazole, pyrimido[1,2- a]benzimidazole and triazolo[4,3- a]pyrimidine derivativesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2008Mohamed R. Shaaban 4-Acetyl-5-methyl-1-phenyl-1H -pyrazole reacts with dimethylformamide dimethylacetal (DMF-DMA) to afford the corresponding (E)1-(5-methyl-1-phenyl-1H -pyrazol-4-yl)-3-(N,N -dimethylamino)-2-propen-1-one. The latter product undergoes regioselective 1,3-dipolar cycloaddition with nitrilimines and nitrile oxides to afford the novel 3-aroyl-4-(5-methyl-1-phenyl-1H -pyrazol-4-yl)carbonyl-1-phenylpyrazole and 3-aroyl-4-(5-methyl-1-phenyl-1H -pyrazol-4-yl)carbonyl isoxazole derivatives, respectively. It reacts also with 1H -benzimidazole-2-acetonitrile, 2-aminobenzimidazole and 3-amino-1,2,4-triazole to afford the novel pyrido[1,2- a]benzimidazole, pyrimido[1,2- a]benzimidazole and the triazolo[4,3- a]pyrimidine derivatives, respectively. The reaction of 3-aroyl-4-(5-methyl-1-phenyl-1H -pyrazol-4-yl) carbonyl-1-phenylpyrazole derivatives with hydrazine hydrate led to a new pyrazolo[3,4- d]pyridazine derivatives. [source] | ||||||||||