Synthesis of Functionalized<i>H</i>-[1]Benzopyrano[2,3-<i>b</i>]pyridines by the<i>Friedländer</i>Approach: Antimycobacterial and Antimicrobial Profile
作者:Dhaval D. Haveliwala、Nimesh R. Kamdar、Prashant T. Mistry、Saurabh K. Patel
DOI:10.1002/hlca.201200121
日期:2013.5
A series of functionalized H‐[1]benzopyrano[2,3‐b]pyridine derivatives were synthesized by the Friedländer reaction of 2‐amino‐4‐oxo‐4H‐chromene‐3‐carbonitriles 1 with malononitrile, ethyl cyanoacetate, or acetophenone (Scheme). The synthesized compounds 2–4 were screened for their in vitro activity against antitubercular, antibacterial, and antifungal species (Fig., Table). Among the synthesized compounds
通过2-氨基-4-氧代-4 H-色烯-3-腈1的Friedländer反应与丙二腈,氰基乙酸乙酯或苯丙氨酸的Friedländer反应合成了一系列功能化的H- [1]苯并吡喃并[2,3- b ]吡啶衍生物。苯乙酮(Scheme)。筛选了合成的化合物2 – 4对抗结核,抗菌和抗真菌物种的体外活性(图,表)。在合成的化合物中,3c和4f的活性最高,对结核分枝杆菌H 37的抑制率为99%Rv,而化合物2f,3f和4d分别显示69%,63%和61%的抑制作用。4-氨基-7,9-二溴-1,5-二氢-2,5-二氧代2 H-铬色[2,3 - b ]吡啶-3-腈(3b)对大肠杆菌具有最强的抗菌活性大肠杆菌和铜绿假单胞菌。几种chromeno [2,3- b ]吡啶衍生物对金黄色葡萄球菌和白色念珠菌具有相同或更高的效力。