Chemoselective Three Component Reactions of 3-Aminopyrazoles, Aldehydes and Malononitrile: Optimize the Structures and Compute the Energies of Possible Tautomers
Pyrazoles and Isoxazoles Based Sulfanilamide and Phenazone as Antimicrobial Agents: Synthesis and Biological Activity
作者:A. H. Moustafa、H. A. El-Sayed、S. M. El Rayes、H. A. Morsy、S. H. Abd-allah、H. F. Ismail、M. M. Abd El-Aal
DOI:10.1134/s1070363219110240
日期:2019.11
phenazone via diazotization and coupling with a wide range of α-CH acids followed by heterocyclization with hydrazine derivative, hydroxylamine and cyanoacetamide. The antimicrobial tests of the products demonstrate high to moderate activity against Gram (−ve) bacteria and the tested fungi. No positive action of the products is observed against Gram (+ve) bacteria.
Reaction of (chloro carbonyl) phenyl ketene with 5-amino pyrazolones: Synthesis, characterization and theoretical studies of 7-hydroxy-6-phenyl-3-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine-2,5(1H,4H)-dione derivatives
Abstract New 7-hydroxy-6-phenyl-3-(phenyldiazenyl)pyrazolo[1,5- a ]pyrimidine-2,5(1 H ,4 H )-dione derivatives were synthesized from the reaction of (chlorocarbonyl)phenyl ketene and 5-amino pyrazolones in high to excellent yields and short reaction times. Structures of the new compounds were fully characterized by their spectral data IR, 1 H NMR, and 13 C NMR and by the theoretical results. Density
摘要 由(氯羰基)苯基乙烯酮与(氯羰基)苯基乙烯酮反应合成了新的7-羟基-6-苯基-3-(苯基二氮烯基)吡唑并[1,5-a]嘧啶-2,5(1 H ,4 H)-二酮衍生物。 5-氨基吡唑啉酮以高到极好的收率和较短的反应时间。新化合物的结构通过其光谱数据 IR、 1 H NMR 和 13 C NMR 以及理论结果进行了充分表征。密度泛函理论 (DFT) 用于优化结构,计算所需产品的能量和振动频率 IR 和 1 H NMR 屏蔽张量。将理论结果与实验数据进行了比较。