Novel benzimidazolyl tetrahydroprotoberberines: Design, synthesis, antimicrobial evaluation and multi-targeting exploration
作者:Ponmani Jeyakkumar、Han-Bo Liu、Lavanya Gopala、Yu Cheng、Xin-Mei Peng、Rong-Xia Geng、Cheng-He Zhou
DOI:10.1016/j.bmcl.2017.02.071
日期:2017.4
were conveniently designed and efficiently synthesized from berberine via direct cyclization of tetrahydroprotoberberine aldehyde and o-phenylene diamines under metal-free aerobic oxidation. All the new compounds were characterized by IR, 1H NMR, 13C NMR and HRMS spectra. The antimicrobial evaluation revealed that the 5-fluorobenzimidazolyl derivative 5b was the most active antibacterial and antifungal
方便地设计了一系列新颖的苯并咪唑基四氢小ber碱,并通过在无金属的有氧氧化作用下四氢小ber碱醛和邻苯二胺的直接环化反应,从小efficiently碱中高效合成了这些新的苯并咪唑基四氢小ber碱。所有新化合物均通过IR,1H NMR,13C NMR和HRMS光谱进行了表征。抗菌评估显示,与小Ber碱,绿霉素,诺氟沙星和氟康唑相比,5-氟苯并咪唑基衍生物5b是最活跃的抗菌和抗真菌分子,其光谱范围广。即使经过15代,它也几乎没有引发针对MRSA的抗药性。进一步的研究表明,化合物5b不仅可以通过氢键与Topo IA有效相互作用,而且可以插入小牛胸腺DNA中并切割pBR322 DNA,