乙酸2-硒代氧-2- H-吡啶-1-基酯与苯炔的反应:苯并[ b ]硒代[2,3- b ]吡啶的简便途径
摘要:
苯炔及其3,4,5,6-四苯基,3-和4-甲基,3-甲氧基和4,5-二氟衍生物与乙酸2-硒代氧-2 H-吡啶-1-基酯4a-e反应得到适量收率的苯并[ b ]硒代[2,3- b ]吡啶10-15。苯并炔是通过以下一种或多种方法生成的:用硝酸异戊酯将邻氨基苯甲酸5a-g重氮化;将5a-g邻氨基苯甲酸重氮化。2-重氮碘苯甲酸盐酸盐的温和热分解6a-d处理(苯基)[ o-三氟甲磺酸-((三甲基甲硅烷基)苯基]三氟甲磺酸鎓盐(7);氟化铯制备2-三甲基甲硅烷基苯基三氟甲磺酸酯8a-c。在所有反应中,还获得了相应的2-(甲基硒烯基)吡啶16a-d,表明这些反应可能涉及通过SET(单电子转移)将硒添加到苯炔中。
Intramolecular C−H Activation as an Easy Toolbox to Synthesize Pyridine‐Fused Bipolar Hosts for Blue Organic Light‐Emitting Diodes
作者:Fei Wang、Luoqiang Zhang、Weiguo Han、Zhengyang Bin、Jingsong You
DOI:10.1002/anie.202205380
日期:2022.8.8
Iridium-catalyzed intramolecular oxidative C−H/C−H coupling reactions have been developed to rapidly build a library of structurally and functionallydiverse benzoheteroaromatic-fused pyridine skeletons. This new synthetic strategy allowed to explore and highlight the high performance of bipolar host materials for blue OLEDs.