1310492-90-0Relevant articles and documents
Synthesis of 2-Aryl-3-(arylselanyl)imidazo[1,2- a ]pyridines: Copper-Catalyzed One-Pot, Two-Step Se -Arylation of Selenium with Imidazopyridines and Triarylbismuthanes
Kondo, Kaito,Matsumura, Mio,Kanasaki, Keiko,Murata, Yuki,Kakusawa, Naoki,Yasuike, Shuji
, p. 2200 - 2210 (2018)
A simple and general method for the synthesis of 2-aryl-3-(arylselanyl)imidazo[1,2- a ]pyridines is described. A one-pot, two-step reaction between triarylbismuthanes and diimidazopyridyl diselenides, generated from imidazo[1,2- a ]pyridines and Se powder in the presence of CuI and 1,10-phenanthroline, affords 3-selanylimidazopyridines in moderate to excellent yields under aerobic conditions. The reactions proceed efficiently and the selenium and all the aryl groups on bismuth are transferred to the coupling products. Triarylbismuthanes give better results compared to other aryl donors containing elements such as boron, silicon, tin, and iodine.
Nickel-catalyzed C(sp2)-H selenation of imidazo[1,2-α]pyridines with arylboronic acids or alkyl reagents using selenium powder
Zhu, Jie,Zhu, Wenhui,Xie, Ping,Pittman, Charles U.,Zhou, Aihua
, p. 6569 - 6576 (2018)
A novel and efficient Ni-catalyzed aryl- and alkyl-selenation of imidazo[1,2-α]pyridines employing selenium powder has been developed for the first time. The significant advantages of this protocol are that it is an inexpensive nickel catalyst and exhibits broad functional-group compatibility and good reaction yields.
Ultrasound-assisted synthesis of imidazo[1,2-a]pyridines an d sequential one-pot preparation of 3-selanyl-imidazo[1,2-a]pyridine derivatives
Vieira, Beatriz M.,Padilha, Nathalia,Nascimento, Nelson M.,Perin, Gelson,Alves, Diego,Schumacher, Ricardo F.,Lenard?o, Eder J.
, p. 6 - 23 (2019)
A simple and rapid method to synthesize imidazo[1,2-a]pyridines starting from 2-aminopyridine and 2-bromoacetophenone derivatives under ultrasonic irradiation was developed. This protocol tolerates a wide range of 2-bromoacetophenone derivatives to produce a variety of imidazo[1,2-a]pyridines in good to excellent yields. Additionally, the one-pot preparation of 3-(organylselanyl)imidazo[1,2-a]pyridines via a sequential method is presented. In this case, different diorganyl diselenides were used as starting materials to afford the corresponding coupling products in excellent yields and short reaction times under sonication. The reactions were conducted in PEG-400, a cheap and nontoxic solvent, compatible with the ultrasound conditions in an environmentally benign process.
Electrochemical regioselective C-H selenylation of 2H-indazole derivatives
Lin, Shengsheng,Cheng, Xiaomei,Hasimujiang, Balati,Xu, Zhongnan,Li, Fengtan,Ruan, Zhixiong
supporting information, p. 117 - 121 (2021/12/29)
Selenium-substituted heteroarenes are biologically active compounds and useful building blocks. In this study, we have developed a metal- and oxidant-free, environmentally friendly protocol for the regioselective selenylation of 2H-indazole derivatives by
Metal-free regioselective C-H chalcogenylation of coumarins/(hetero)arenes at ambient temperature
Song, Zengqiang,Ding, Chaochao,Wang, Shaoli,Dai, Qian,Sheng, Yaoguang,Zheng, Zhilong,Liang, Guang
supporting information, p. 1847 - 1850 (2020/02/22)
A novel, practical and metal-free approach for the regioselective selenation of coumarins employing (bis(trifluoroacetoxy)iodo)benzene (PIFA) at room temperature is presented. The developed method is suitable for a wide substrate scope and affords 3-selen
