Microwave-assisted Synthesis of 6-{(5-Aryl-1,3,4-oxadiazol-2-yl)methyl}-6<i>H</i>-indolo[2,3-<i>b</i>]quinoxalines
作者:Sreenivas Avula、Jayaram Reddy Komsani、Satish Koppireddi、Rambabu Yadla
DOI:10.1002/jhet.2272
日期:2015.11
convenient synthesis of a new series of 2‐(6H‐indolo[2,3‐b]quinoxalin‐6‐yl)methyl}‐5‐aryl‐1,3,4‐oxadiazoles from readily available 1,2‐diaminobenzene and isatins under microwave irradiation conditions was disclosed. The 6‐(5‐aryl‐1,3,4‐oxadiazol‐2‐yl)methyl}‐6H‐indolo[2,3‐b]quinoxalines were also prepared by the thermal cyclo‐condensation reaction of 2‐(6H‐indolo[2,3‐b]quinoxalin‐6‐yl)acetohydrazides
从现成的1,2,(6 H-吲哚[2,3 - b ]喹喔啉-6-基)甲基} -5-芳基-1,3,4-恶二唑中高效合成新的系列1,公开了在微波辐射条件下的2-二氨基苯和靛红。6-(5-芳基-1,3,4-恶二唑-2-基)甲基} -6 H-吲哚并[2,3- b ]喹喔啉也可以通过2-(-在回流的POCl 3中将6 H-吲哚并[2,3 - b ]喹喔啉-6-基)乙酰肼与羧酸一起使用。与热反应方案相比,微波辅助合成快速,可在较低的操作温度下提高产品的收率,减少废物的产生。