One-Pot Multicomponent Synthesis of Novel Substituted Imidazo[1,2-<i>a</i>]Pyridine Incorporated Thiazolyl Coumarins and their Antimicrobial Activity
作者:Rajitha Gali、Janardhan Banothu、Rajitha Bavantula
DOI:10.1002/jhet.2116
日期:2015.5
A series of novel substituted imidazo[1,2‐a]pyridine incorporated thiazolyl coumarin derivatives (4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l, 4m, 4n, 4o, 4p, 4q, 4r, 4s, 4t) were synthesized in good yields via one‐pot multicomponent condensation of substituted imidazo[1,2‐a]pyridine‐3‐carbaldehyde (3a, 3b, 3c, 3d, 3e), thiosemicarbazide (2), and substituted 3‐(2‐bromoacetyl)‐2H‐chromen‐2‐ones (1a
一系列新型取代的咪唑并[1,2- a ]吡啶并入噻唑基香豆素衍生物(4a,4b,4c,4d,4e,4f,4g,4h,4i,4j,4k,4l,4m,4n,4o,4p,4q,4r,4s,4t)是通过取代的咪唑[1,2-a]一锅多组分缩合反应以高收率合成的]吡啶-3-甲醛(3a,3b,3c,3d,3e),硫代氨基脲(2)和取代的3-(2-溴乙酰基)2 H chromen-2-one(1a,1b,1c,1d)在回流的乙醇中用催化量的乙酸/ 2-(2-溴乙酰基)-3 H-苯并[ f ]铬n-3-1(1e)。所有合成的化合物(4a,4b,4c,4d,4e,4f,4g,4h,4i,4j,4k,4l,4m,4n,4o,4p,4q,4r,4s,4t)已通过IR,NMR和质谱研究以及元素分析进行了表征,并对其进行了体外评估对不同细菌和真菌菌株的抗菌活性。所有化合物均显示出中等的抗菌活性,最低抑菌浓度为150