摘要
An efficient approach to sulfur-bridged imidazopyridines has been developed under metal-free conditions using inexpensive sulfur powder as the sulfur source.Most appealingly,the reaction can proceed smoothly without addition of any additives,ultimately decreasing the production of chemical waste.The inexpensive and green method should provide a useful strategy for constructing a library of novel and biological interesting heteroaromatic sulfides.
基金
This work was supported by the National Natural Science Foundation of China(No.21302110)
the Natural Science Foundation of Shandong Province(No.ZR2016JL012)
the Scientific Research Foundation of Qingdao University of Science and Technology.