Design and synthesis of biquinolone–isoniazid hybrids as a new class of antitubercular and antimicrobial agents
摘要:
Twenty four biquinolone-isoniazid hybrids were designed based on molecular hybridization technique and synthesized via multicomponent cyclocondensation (MCC) approach. All the newly synthesized compounds were screened for their antimicrobial and antitubercular activities. The brine shrimp bioassay was carried out to study the cytotoxicity of the synthesized compounds. Hybrids 7f (MIC = 25 mu g/mL); 7a, 7e and 7m (MIC = 50 mu g/mL); 7g, 7h and 7k (MIC = 62.5 mu g/mL) exhibited excellent antimicrobial activity as compared with standard drugs. Hybrids 71 and 7j displayed 99% inhibition against Mycobacterium tuberculosis bacteria with better LC50 values 35.39 and 34.59 mu g/mL, respectively. These results indicate that the synthesized compounds can act as leads for the development of newer antimicrobial and antitubercular compounds. (C) 2013 Elsevier Masson SAS. All rights reserved.
Microwave-assisted CAN-catalyzed solvent-free synthesis of N-allyl quinolone-based pyrano[4,3-b]chromene and benzopyrano[3,2-c]chromene derivatives and their antimicrobial activity
作者:Hardik H. Jardosh、Manish P. Patel
DOI:10.1007/s00044-012-0085-z
日期:2013.2
A newseries of pyrano[4,3-b]chromene and benzopyrano[3,2-c]chromene derivatives have been synthesized via microwave-assisted one-pot, three-component reaction of N-allyl quinolones, cyclic β-diketones, and 4-hydroxy-6-methyl-2H-pyran-2-one/4-hydroxy coumarin in the presence of catalytic amount of ceric ammonium nitrate under solvent-free condition. The protocol offers expeditious and solvent-free
通过微波辅助一锅三组分N-烯丙基喹诺酮,环状β-二酮,合成了一系列新的吡喃并[4,3- b ]色烯和苯并吡喃并[3,2- c ]色烯衍生物。在无溶剂条件下催化量的硝酸铈铵存在下,生成4-羟基-6-甲基-2 H-吡喃-2-酮/ 4-羟基香豆素。该规程提供了快速,无溶剂的合成方法,并具有极高的收率,可为熔融二苯酮提供抗微生物活性。合成化合物的化学结构通过1 H NMR进行了阐明,1313 C NMR,FT-IR,元素分析和质谱数据。通过肉汤微量稀释最小抑制浓度法针对代表性的致病菌株筛选所有化合物。在这些衍生物中,与标准药物相比,发现化合物6i,6k,6l和6m具有令人钦佩的活性。
Library design, synthesis and biological exploration of novel 3,4′-bicarbostyril derivatives as potent antimicrobial, antitubercular and antimalarial agents
作者:Hardik H. Jardosh、Nileshkumar D. Vala、Manish P. Patel
DOI:10.1007/s00044-017-1797-x
日期:2017.5
AbstractA library comprises diversely substituted novel 3,4′-bicarbostyril derivatives have been designed by molecular hybridization technique and synthesized via multi-component reaction . Compounds G22 (MIC = 12.5 µg/mL) and G38 (MIC = 25 µg/mL) exhibited 99% inhibition against Mycobacterium tuberculosis, while compounds G40 (IC50 = 0.019 µg/mL) and G20 (IC50 = 0.028 µg/mL) found to have excellent
Microwave-induced CAN promoted atom-economic synthesis of 1H-benzo[b]xanthene and 4H-benzo[g]chromene derivatives of N-allyl quinolone and their antimicrobial activity
作者:Hardik H. Jardosh、Manish P. Patel
DOI:10.1007/s00044-012-0301-x
日期:2013.6
Some new 1H-benzo[b]xanthene and 4H-benzo[g]chromene derivatives of N-allyl quinolone were efficiently synthesized via microwave-induced one-pot three component reaction of N-allyl quinolones, 2-hydroxy-1,4-naphthoquinone and cyclic β-diketones/malononitrile, and iso-propylcyanoacetate in the presence of catalytic amount of cericammoniumnitrate under solvent-free condition. This methodology allowed
通过微波诱导的N-烯丙基喹诺酮,2-羟基-1的一锅三组分反应,高效合成了一些新的N-烯丙基喹诺酮的1 H-苯并[ b ]氧杂蒽和4 H-苯并[ g ]色烯衍生物。4-萘醌和环状β-二酮/丙二腈和异在无溶剂条件下催化量的硝酸铈铈铵存在下,生成-丙基氰基乙酸酯。这种方法使我们无需使用溶剂即可在非常短的时间内以优异的产率获得所需的产品。计算了所有新合成的化合物的原子经济%,发现范围为92–96%。通过1 H NMR,13 C NMR,FT-IR,元素分析和质谱数据阐明标题的衍生物,并使用微量稀释最小抑菌浓度法针对一组致病性细菌和真菌进行了测试。结构活性关系分析表明,不同组的电子影响和亲脂性在抗菌效力上有很大差异。