Superfast synthesis, antibacterial and antifungal studies of halo-aryl and heterocyclic tagged 2,3-dihydro-1H-inden-1-one candidates
作者:Rahul A. Shinde、Vishnu A. Adole、Bapu S. Jagdale、Thansing B. Pawar
DOI:10.1007/s00706-021-02772-0
日期:2021.6
activities against two Gram-positive (Staphylococcus aureus and Bacillus subtilis) and two Gram-negative bacteria (Escherichia coli and Proteus vulgaris), and also two fungal agents (Aspergillus niger and Candida albicans). Most of the compounds were found to exert potentantibacterial action with broad-spectrum antibacterial activity. Likewise, few compounds were revealed to have potent antifungal properties
我们描述了卤代芳基和杂环标记的2,3-二氢-1 H-茚满一酮衍生物的成功合成,以及它们的抗菌和抗真菌特性。通过研磨,搅拌和超声辐照方法合成了来自2,3-二氢-1 H-茚基-1-一的总共15种衍生物。这些发现表明,超声技术在时间和合成性能方面越来越令人满意。测试了合成的化合物对两种革兰氏阳性菌(金黄色葡萄球菌和枯草芽孢杆菌)和两种革兰氏阴性菌(大肠杆菌和寻常变形杆菌)以及两种真菌剂的抗菌活性。黑曲霉和白色念珠菌)。发现大多数化合物都具有强大的抗菌作用,并具有广谱抗菌活性。同样,几乎没有化合物显示出对黑曲霉和白色念珠菌具有有效的抗真菌特性。通过FT-IR,1 H NMR,13 C NMR和HRMS光谱技术对合成的化合物进行表征。 图形摘要
Substrate-Switched Chemodivergent Pyrazole and Pyrazoline Synthesis: [3 + 2] Cycloaddition/Ring-Opening Rearrangement Reaction of Azadienes with Nitrile Imines
作者:Liang Tu、Limei Gao、Qiang Wang、Zhixing Cao、Rong Huang、Yongsheng Zheng、Jikai Liu
DOI:10.1021/acs.joc.1c02998
日期:2022.3.4
new reaction model of benzofuran-derived azadienes (BDAs), an unprecedented synthesis of biologically important pyrazoles has been achieved through a tandem [3 + 2] cycloaddition/ring-opening rearrangement reaction of BDAs with nitrile imines. The nature and type of substrates are found to act as a chemical switch to trigger two distinct reaction pathways. A minor modification to the substrates allows
Catalytic enantioselective cascade Michael/cyclization reaction of 3-isothiocyanato oxindoles with exocyclic α,β-unsaturated ketones en route to 3,2′-pyrrolidinyl bispirooxindoles
作者:Satavisha Kayal、Santanu Mukherjee
DOI:10.1039/c6ob02187e
日期:——
Cascade Michael/cyclization reactions between 3-isothiocyanato oxindoles and exocyclic α,β-unsaturated ketones are shown to proceed efficiently in the presence of a quinine-derived tertiary amino-squaramide catalyst and furnish 3,2′-pyrrolidinyl bispirooxindoles containing two spiro-quaternary and three contiguous stereocenters as a single diastereomer with excellent enantioselectivities (up to 99 : 1
BF<sub>3</sub>·Et<sub>2</sub>O mediated one-step synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines
作者:C. T. Fathimath Salfeena、K. T. Ashitha、B. S. Sasidhar
DOI:10.1039/c6ob02133f
日期:——
A simple and efficient one-pot synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines by a BF3·Et2O mediated novel methodology, from easily available α,β-unsaturated ketones/arylidene ketones, phenyl acetylenes and substituted nitriles, has been described. This novel annulation provides quick access to complex polycyclic frameworks with an excellent substrate
Intermolecular Reductive Cyclodimerization of Cyclic α,β-Unsaturated Ketones Promoted by a Low-Valent Titanium Reagent: A Facile Synthesis of Some New Spiro Compounds
作者:Da-Qing Shi、Guo-Lan Dou、Zheng-Yi Li、Chun-Ling Shi、Xiao-Yue Li、Hong Jiang、Sai-Nan Ni、Shun-Jun Ji
DOI:10.1055/s-2007-983707
日期:2007.6
β-unsaturated ketones such as 2-benzylideneindan-1-ones, 2-benzylidene-1 -tetralones, 3-benzylidenechroman-4-ones, and 3-benzylidenethiochroman-4-ones induced by a low-valent titanium reagent were studied. Some new spiro compounds were prepared in good yields under neutral and mild conditions. High stereoselectivity was achieved and the stereochemistry of the products was confirmed by X-ray diffraction
α,β-不饱和酮如 2-benzylideneindan-1-ones、2-benzylidene-1-tetralones、3-benzylidenechroman-4-ones 和 3-benzylidenethiochroman-4-ones 的分子间还原环二聚反应对低价钛试剂进行了研究。一些新的螺环化合物在中性和温和条件下以高收率制备。实现了高立体选择性,并通过 X 射线衍射分析证实了产物的立体化学。