摘要在氢硼化钠和氯乙酰胺存在下,将5-氯-3-甲基-1-苯基吡唑-4-甲腈3与硒反应,生成硒酸乙酰胺5,将其与乙醇钠一起加热,进行Thorpe–Ziegler环化反应,制得新颖的合成物4-氨基-3-甲基-1-苯基-1H-硒代[2,3 - c ]吡唑-5-羧酰胺化合物(6)。后一种化合物用作合成其他杂环的通用前体,即嘧啶,咪唑并嘧啶和噻二嗪并嘧啶与硒代[2,3- c]吡唑部分。通过元素和光谱分析(IR,1 H NMR,13 C NMR和质谱分析)对新合成的化合物及其衍生物进行了表征。此外,针对各种病原细菌和真菌菌株筛选了一些合成的化合物。结果表明,大多数合成的化合物对革兰氏阳性和革兰氏阴性细菌均具有显着的抗菌活性。而且,这些化合物中的一些显示出显着的抗真菌活性,尤其是白色念珠菌。另一方面,与消炎痛相比,使用角叉菜胶诱导的大鼠爪水肿试验,某些合成的化合物具有较高的抗炎活性。 图形概要本工作讨论
A Convenient Synthesis, Reactions and Biological Activity of Some New 6H-Pyrazolo[4’,3’:4,5]thieno[3,2-d][1,2,3]triazine Compounds as Antibacterial, Anti-Fungal and Anti-Inflammatory Agents
作者:Remon Zaki、Adel Kamal El-Dean、Shaban Radwan、Ahmed Saber
DOI:10.21577/0103-5053.20180127
日期:——
We describe here the design and synthesis of novel pyrazolothienotriazine compounds based on diazotization followed by cycloaddition reactions of 4-amino-3-methyl-1-phenyl1H-thieno[2,3-c]pyrazol-5-carbonitrile with sodium nitrite in the presence of concentrated HCl in acetic acid. The produced chloropyrazolothienotriazine underwent nucleophilic substitution reactions with various primary and secondary
A convenient green synthetic approach to the synthesis of novel bioactive selenolo[2,3‐
<i>c</i>
]pyrazoles as antibacterial and antifungal agents
作者:Remon M. Zaki、Yasser A. El‐Ossaily、Ahmed A. Geies
DOI:10.1002/jhet.3805
日期:2020.2
compounds was confirmed by elemental and spectral analyses including Fourier transform infrared (FTIR), 1H‐NMR, and 13C‐NMR and mass spectroscopy for some of them. Furthermore, some of these compounds were screened against various pathogenic bacterial and fungal strains. Their results demonstrated that some of them revealed remarkable antimicrobial activities.
A New and Facile Synthesis of Novel Pyrazolothienopyrimidines and Imidazopyrazolothienopyrimidines
作者:Remon M. Zaki、Adel M. Kamal El-Dean、Abdullah Y. Abdulrazzaq
DOI:10.1002/jccs.201500292
日期:2015.12
pyrazolothienopyrimidine 7, which underwent nucleophilic substitution reactions with various primary and secondary amines to give the alkyl (aryl) amino pyrimidine compounds 8a–d. On the other hand, the reaction of chloropyrimidine 7 with thiourea afforded the pyrimidine thione compound 9, which was alkylated with α‐halogentaed compounds to afford the S‐alkylated derivatives 10a–c. Also, chloroacetylation of the
Synthesis, reactions, and spectral characterization of some new biologically active compounds derived from thieno[2,3‐
<i>c</i>
]pyrazole‐5‐carboxamide
作者:Ahmed F. Saber、Remon M. Zaki、Adel M. Kamal El‐Dean、Shaban M. Radwan
DOI:10.1002/jhet.3769
日期:2020.1
intermediate for the preparation of other new heterocyclic systems containing pyrazolylacetyl pyrazolothienopyrimidines and pyrazolothieno‐pyrimidotriazepine compounds 6–11. The structures of these new heterocycles have been characterized by using analytical and spectroscopic analyses (IR, 1H‐NMR, 13C‐NMR and MS). Some derivatives of the synthesized compounds exhibited remarkable antibacterial and antifungal
事先根据文献方法合成的起始化合物4-氨基-3-甲基-1-苯基-1 H-噻吩并[2,3 - c ]吡唑-5-羧酰胺(1)与在AcOH或DMF中加入邻苯二甲酸的酸酐,分别制得异吲哚基吡唑-5-羧酰胺3和吡唑并噻吩并嘧啶并异吲哚二酮4。另外,使其与丙二酸二乙酯反应,然后通过水合肼进行肼解,从而得到吡唑并硫代嘧啶基乙酰乙酰肼5。碳酰肼衍生物5用作制备含吡唑基乙酰基吡唑并噻吩并嘧啶和吡唑并噻吩并嘧啶并三氮杂compounds化合物6-11的其他新杂环系统的关键中间体。这些新杂环的结构已通过分析和光谱分析(IR,1 H-NMR,13 C-NMR和MS)进行了表征。合成化合物的某些衍生物对许多细菌和真菌菌株显示出显着的抗菌和抗真菌活性。
Design, synthesis and evaluation of novel Se-alkylated pyrazoles and their cyclized analogs as potential anticancer agents
作者:Remon M. Zaki、Mohmmad Y. Wani、Arif Mohammed、Waleed A. El-Said
DOI:10.1016/j.molstruc.2022.134670
日期:2023.3
A simple multicomponent reaction (MCR) was utilized to synthesize a series of 5-alkylated selanyl-1H-pyrazole derivatives 3a-d, 6a-d, and their 4-amino-5-substituted selenolo[2,3-c]pyrazole analogs (4a-d). The methodology is based on the substitution of selenium for the chlorine atom in the chloro pyrazole carbonitrile compound 1 via reduction with sodium borohydride in a nitrogen atmosphere, followed