Synthesis and Antimicrobial Activities of Some Triazole, Thiadiazole, and Oxadiazole Substituted Coumarins
作者:K. Rajasekhar Reddy、R. Mamatha、M. S. Surendra Babu、K. Shiva Kumar、K. N. Jayaveera、G. Narayanaswamy
DOI:10.1002/jhet.1745
日期:2014.1
furnish coumarin derivatives possessing triazoles 4a, 4b, 4c, 4d, 4e, thiadiazoles 5a, 5b, 5c, 5d, 5e, and oxadiazoles 6a, 6b, 6c, 6d, 6e, respectively. The structures of all the compounds have been assigned by elemental analysis and spectral studies. The synthesized compounds were screened for their antimicrobial analgesic activities. The nonconventional controlled microwave irradiation synthesis is carried
由7-羟基-4-甲基-2-香豆素制备2-2-(4-甲基-2-氧代-2-香豆素-7-香豆基)乙酸酯1,将其在沸腾的乙醇中用水合肼进一步处理后得到酰肼化合物2。使所得的酰肼与取代的异硫氰酸芳基酯反应形成硫代氨基脲化合物3a,3b,3c,3d,3e。1-(2-(4-甲基-2-氧代-2-香豆素-7-基氧基)乙酰基)-4-芳基硫代氨基脲3在不同的反应条件下用不同的试剂环化以提供具有三唑4a,4b,4c的香豆素衍生物,4d,4e,噻二唑5a,5b,5c,5d,5e和恶二唑6a,6b,6c,6d,6e, 分别。所有化合物的结构均已通过元素分析和光谱研究确定。筛选合成的化合物的抗菌镇痛活性。非常规控制的微波辐射合成是在70°C(200 W)下进行的。该方法在方法学,高产收率,短反应时间,温和的反应条件,对环境无害且易于后处理方面具有许多优势。