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Short Paper | Regular issue | Vol 92, No. 10, 2016, pp.1874-1881
Published online, 21st September, 2016
DOI: 10.3987/COM-16-13531
Palladium Catalyzed Syntheses of Dibenzothiophenes by Ring-Closure of 2-Iodinated Diaryl Thioether

Ya-Fang Chen, Rui-Yue Ma, Lu-Nan Zhou, Zhen-Ting Du,* and Tao Zhang*

*Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, Shaanxi Province, China

Abstract

An efficient ring-closure of 2-iodo diaryl thioether at the presence of palladium catalyst to form dibenzothiophene is described. After the best condition was set up as Pd3(dba)2 as the catalyst, anhydrous Cu(OAc)2 as additive, PivONa.H2O as base, DMF as solvent, a series of dibenzothiophenes could be successfully obtained through this protocol in moderate to excellent yields.