Synthesis anti-inflammatory and anticancer activity evaluation of some pyrazole and oxadiazole derivatives
摘要:
Pyrazole derivatives IIa-l have been synthesized by condensation of chalcones Ia-f with hydrazine hydrate and phenyl hydrazine under microwave irradiation in good yields. Oxadiazole derivatives IVa-f have been synthesized by condensation of N'-hydroxypicolinamidine, N'-hydroxy isonicotinamidine, N'-hydroxypyrazine-2-carboxamidine with 2,5 dimethoxybenzaldehyde and 3-methoxy-4-hydroxy benzaldehyde, respectively. Structures assigned to IIa-l and IVa-f are fully supported by correct spectral and analytical data. All compounds (IIa-l & IVa-f) have been screened for anti-inflammatory and anticancer activities. Compounds IIj, IIk, and IVb exhibited good anti-inflammatory activity, while, IIa, c, j, and IVd showed better anticancer activity against four and three cancer cell lines, respectively.
antitubercular activities studies. Few of the compounds exhibited excellent anti-inflammatory activities compared to standard drug diclofenac sodium. Some compounds have shown moderate analgesic activities compared to standard drug pentazocine. Also, some compounds have exhibited moderate cytotoxic and antitubercular activities.
在本研究中,一系列新的4-取代的苯基-6-(吡啶-2-基)嘧啶-2-醇(1 – 9)和4-取代的苯基-6-(吡啶-2-基)嘧啶-2硫醇(10 - 18)已通过环化合成的3-取代的苯基基-1-(吡啶-2-基)丙-2-烯-1-酮与脲/硫脲在NaOH存在作为碱(1A - 18A)。在20%NaOH碱存在下,将2-乙酰基吡啶与取代的苯甲醛缩合,制得3-取代的苯基-1-(吡啶-2-基)丙-2-烯-1-酮。通过元素分析,IR,1 H NMR,13表征了新合成化合物的结构。13 C NMR和质谱研究。筛选新合成的化合物的抗炎,止痛,细胞毒性和抗结核活性研究。与标准药物双氯芬酸钠相比,很少有化合物具有出色的抗炎活性。与标准药物喷他佐辛相比,某些化合物具有中等的镇痛作用。同样,某些化合物表现出中等的细胞毒性和抗结核活性。
One-pot solvent-free synthesis of 1,3,5-trisubstituted 1H-pyrazoles catalyzed by H3[PW12O40]/SiO2 under microwave irradiation
An efficient synthesis of 1,3,5-trisubstituted 1H-pyrazoles was developed. 1,3,5-Trisubstituted-1H-pyrazoles were synthesized starting from α,β-unsaturated aldehydes/ketones and hydrazine using catalyst H3[PW12O40]/SiO2 undermicrowaveirradiation and solvent-freeconditions (74–90%) and were characterized by HR-MS, FT-IR, 1H NMR, and 13C NMR spectroscopy. It was found that silica had a good loading
开发了1,3,5-三取代1 H-吡唑的有效合成方法。使用催化剂 H 3 [ PW 12 O 40 ]/SiO 2在微波辐射和无溶剂条件下(74- 90%) 并通过 HR-MS、FT-IR、1 H NMR 和13进行了表征C 核磁共振波谱。研究发现,二氧化硅对磷钨酸有良好的负载分散作用,能有效吸收微波能促进缩合反应。该方法的优点是反应条件环保、操作简单、底物广泛、收率高、H 3 [PW 12 O 40 ]/SiO 2可重复利用。此外,还给出了化合物1-(4-氯苯基)-5-(2-甲氧基苯基)-3-(4-硝基苯基)-1 H-吡唑在三斜晶系P-1空间群中的晶体结构。 图形概要
Synthesis and Luminescence Spectral Properties of New Cyano-Substituted 2,2′-Bipyridine Derivatives
作者:M. Yu. Ievlev、N. S. Mayorov、M. A. Shishlikova、M. Yu. Belikov、I. N. Bardasov、O. V. Ershov
DOI:10.1134/s1070428021120095
日期:2021.12
Previously unknown 2-4-aryl-5-cyano-[2,2′-bipyridin]-6(1H)-ylidene}malononitriles were synthesized by reaction of 3-aryl-1-(pyridin-2-yl)prop-2-en-1-ones (azachalcones) with malononitrile dimer. Their colored solutions showed fluorescence in the yellow–orange region with the emission maxima located at λ 565 to 582 nm, depending on the substituent in position 4 of the pyridine ring bearing cyano groups
Studies on chalcone derivatives: Complex formation, thermal behavior, stability constant and antioxidant activity
作者:Yusif S. El-Sayed、M. Gaber
DOI:10.1016/j.saa.2014.08.061
日期:2015.2
confirm the geometry of the ligands and their Cu(II) complexes. The mode of interaction of the chalcone to copper nanoparticles was studied. The apparent association constants of the colloidal copper nanoparticles:chalcone complexes in solution were evaluated using the spectral method and compared with the formationconstant of the Cu(II) chalcone complexes. Antioxidant activity of these chalcones was evaluated
A series of biologically active N-thiocarbamoyl pyrazoline derivatives have been synthesized using anhydrous potassium carbonate as the catalyst. All the synthesized compounds were characterized by FT-IR, H-1 NMR, C-13 NMR spectral studies, LCMS, CHN Analysis and X-ray diffraction analysis (compound 7). In order to supplement the XRD parameters, molecular modelling was carried out by Gaussian 03W. From the optimized structure, the energy, dipolemoment and HOMO-LUMO energies of all the systems were calculated. (C) 2013 Elsevier B.V. All rights reserved.