Synthesis, characterization, antimicrobial and biofilm inhibitory activities of new N-oxide esters
作者:Sathyam Reddy Yasa、Shiva Shanker Kaki、Y. Poornachandra、C. Ganesh Kumar、Vijayalakshmi Penumarthy
DOI:10.1007/s00044-017-1885-y
日期:2017.8
Novel N-oxide esters were synthesized from tertiary amine esters, which in turn were obtained from the reaction of 11-bromoundecanoic acid and different alkyl amines. The synthesized N-oxide esters were characterized by fourier transform infrared, proton nuclear magnetic resonance, carbon-13 nuclear magnetic resonance, and mass spectral analysis. The synthetic route involved three steps; initially
由叔胺酯合成了新型的N-氧化物酯,叔胺酯又是由11-溴十一烷酸与不同的烷基胺反应制得的。通过红外光谱,质子核磁共振,碳13核磁共振和质谱分析对合成的N-氧化物酯进行了表征。综合路线包括三个步骤。最初,11-溴十一烷酸被转化为11-溴十一烷酸甲酯,然后通过与不同的脂族胺(己基,十二烷基,十八烷基,二辛基和二环己基胺)反应,进一步转变为叔胺(单酯和二酯)。最后,将得到的胺酯转化为Ñ通过用治疗氧化物酯米-氯过苯甲酸。研究了合成的N-氧化物酯(4a – e)的抗微生物和抗生物膜活性。在所有合成的N-氧化物酯中,化合物4a和e表现出良好的抗菌活性,尤其是对致病性革兰氏阳性细菌菌株,其最小抑菌浓度值在7.8-31.2μgmL -1范围内。表现出抗菌活性的化合物也具有有效的抗生物膜活性,发现化合物4e显示出有希望的生物膜抑制活性,IC 50值为6.4μgmL -1抗枯草芽孢杆菌MTCC 121的化合物。