Synthesis of functionalized tetrahydrodibenzo[<i>b</i>,<i>g</i>][1,8]naphthyridin-1(2<i>H</i>)-ones through base-promoted annulation of quinoline-derived dipolarophiles and cyclic enaminones
An eco-friendly and metal-free method for the synthesis of tetrahydrodibenzo[b,g][1,8]naphthyridin-1(2H)-ones was established. Quinoline-derived dipolarophiles and cyclic enaminones as starting materials undergo a 1,4-Michael addition/SNAr tandem annulation reaction affording the target products. This approach features transitionmetal-free conditions, good functional group tolerance and operational
建立了一种环保、无金属的四氢二苯并[ b , g ][1,8]萘啶-1( 2H )-酮的合成方法。喹啉衍生的亲偶极物和环状烯胺酮作为起始原料进行 1,4-Michael 加成/ SN Ar 串联成环反应,得到目标产物。该方法具有无过渡金属条件、良好的官能团耐受性和操作简单性的特点。
Synthesis of promising antimicrobial agents: a novel series of N-(4-(2,6-dichloroquinolin-3-yl)-6-(aryl)pyrimidin-2-yl)-2-morpholinoacetamides
作者:N. C. Desai、K. M. Rajpara、V. V. Joshi、H. V. Vaghani、H. M. Satodiya
DOI:10.1007/s00044-012-0121-z
日期:2013.3
A series of novel compounds N-(4-(2,6-dichloroquinolin-3-yl)-6-(aryl)pyrimidin-2-yl)-2-morpholinoacetamides (5a-l) were synthesized by a series of multistep reactions. Newly synthesized compounds have been characterized by IR, H-1 NMR, C-13 NMR, and mass spectral data. Antimicrobial screening of title compounds 5a-l was examined against Gram-positive bacteria (Staphylococcus aureus and Streptococcus pyogenes), Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), and three fungi (Candida albicans, Aspergillus niger, and Aspergillus clavatus) by serial broth dilution method. Synthesized compounds showed potent inhibitory action against test organisms. Screened compounds 5e-g and 5i-l were associated with considerably higher antibacterial and antifungal activities than commercially used antibiotics.