class of bis and tris heterocycles–pyrazolyl indoles and thiazolyl pyrazolyl indoles were prepared from the Michael acceptor (E)-3-(1H-indol-3-yl)-1-arylprop-2-en-1-ones by ultrasound irradiation technique and tested for antioxidant activity. The thiazolyl pyrazolyl indoles and pyrazolyl indoles showed greater radical scavenging activity than pyrazolinyl indoles. Amongst all the tested compounds, 3-(1-
从Michael受体(E)-3-(1 H -indol-3-yl)-1-arylprop-2-en-1-ones制备了一类新的双和三环杂环-吡唑基吲哚和噻唑基吡唑基吲哚。超声波辐照技术并测试其抗氧化活性。噻唑基吡唑基吲哚和吡唑基吲哚显示出比吡唑啉基吲哚更大的自由基清除活性。在所有测试化合物中,3-(1-(4''-(对氯苯基)噻唑-2''-基)-3'-对甲苯基-1 H-吡唑-5'-基)-1 H -吲哚(7b)和3-(1-(4''-(对氯苯基)噻唑-2''-基)-3'-(对甲氧基苯基)-1 H-吡唑-5'-基)- 1个与标准药物抗坏血酸相比,H-吲哚(7c)显示出有希望的抗氧化活性。与具有吸电子基团(Cl,Br,NO 2)的那些相比,在苯环上具有给电子基团(CH 3,OCH 3)的化合物表现出更大的抗氧化活性。
Solution Phase Combinatorial Synthesis and Screening of Mini Libraries of Arylchalcones for Antibacterial Activity
作者:Neela Bhatia
DOI:10.3797/scipharm.0803-36
日期:——
The solution-phase combinatorialsynthesis of aryl chalcones was studied by synthesizing a 6x4 array mini library. The mini libraries of chalcones were synthesized by condensation of 4-substituted acetophenones and various aryl/heteroaryl carbaldehydes. All the synthesized mini libraries were screened for antibacterial activity using serial dilution method. The mini-libraries 31a,2a–d}, 31b,2a–d}
Synthesis, Fungistatic, Protistocidal, and Antibacterial Activity of 1-(3-Amino-2-Hydroxypropyl)Indoles
作者:K. F. Suzdalev、L. D. Popov、A. A. Zubenko、Yu. D. Drobin、L. N. Fetisov、A. N. Bodryakov、N. M. Serbinovskaya
DOI:10.1134/s106816201801017x
日期:2018.3
A series of new indole derivatives containing the 3-amino-2-hydroxypropyl group at the nitrogen atom has been synthesized by the ring-opening of the oxirane cycle of 1-oxiranylmethylindoles. Their antibacterial, fungicidal, and protistocidal activities have been studied. Most of the synthesized compounds have been shown to exhibit a high protistocidal activity that several times exceeds that of the
Ring-chain isomerism in conjugated guanylhydrazones: Experimental and theoretical study
作者:Deepika Kathuria、Sumit S. Chourasiya、Sanjay K. Mandal、Asit K. Chakraborti、Uwe Beifuss、Prasad V. Bharatam
DOI:10.1016/j.tet.2018.04.042
日期:2018.6
first case of ring-chain isomerism in conjugated guanylhydrazones. The acyclic conjugated guanylhydrazone and the corresponding annulated product (4,5-dihydro-1H-pyrazole-1-carboximidamide) could be clearly distinguished by means of UV and NMR spectroscopy. The formation of the ring isomer was further confirmed by single crystal XRD analysis. The time-dependent 1H NMR study indicated the gradual transformation
根据文献报道,在酸性条件下用氨基胍在较短的反应时间(1小时)内处理1,3-二芳基丙烯-2-酮可得到相应的胍。然而,当反应时间增加至12小时时,观察到环环状产物4,5-二氢-1 H-吡唑-1-羧酰亚胺酰胺的形成。这是共轭胍hydr中环链异构的第一种情况。无环共轭和相应的环状产物(4,5-二氢-1 H-吡唑-1-羧酰亚胺)可以通过紫外和核磁共振光谱清楚地区分。通过单晶XRD分析进一步证实了环异构体的形成。时间相关的11 H NMR研究表明开链化合物逐渐转变成环状化合物。使用量子化学方法探索了这两种产物形成的机理见解,结果表明环异构体在热力学上比开链异构体稳定6-11 kcal / mol,发现环化障碍为31.37 kcal /摩尔
Anti-inflammatory, analgesic and antipyretic 4,6-disubstituted 3-cyano-2-aminopyridines
4,6-diaryl and 4,6-aryl-indolyl substituted 3-cyano-2-aminopyridines were synthesized and submitted to evaluation for their anti-inflammatory, analgesic and antipyretic activity. The electronegativity of the substituents and their displacement on the 4- or 6-aryl ring of the 4,6-diaryl-3-cyano-2-aminopyridine nucleus (3a-q) influenced the anti-inflammatory activity which was higher in the presence of electron-realising groups. The introduction of the indol-3-yl substituent in the 4-position of the 3-cyano-2-aminopyridine nucleus (6a-x) increased the anti-inflammatory and analgesic power, but there was no evidence of the relationship among the electronic characteristic of the substituents, their displacement on the 6-phenyl ring and the activity. Conversely, the displacement of the 2-hydroxyphenyl group in the 4-position (4a-e) and of the indol-3-yl group in the 6-position (8h-w) decreased the anti-inflammatory activity. All derivatives did not show any significative antipyretic activity. (C) Elsevier, Paris.