Copper-catalyzed direct thiolation of xanthines and related heterocycles with disulfides
作者:Zuying He、Fang Luo、Yinglong Li、Gangguo Zhu
DOI:10.1016/j.tetlet.2013.08.097
日期:2013.10
A novel copper-catalyzed, base-free direct thiolation of xanthines and related heterocycles is described, featuring the use of inexpensive Cu(OAc)2·H2O as the catalyst, O2 as a clean and cheap oxidant, and easy-to-handle disulfides as the thiolation reagents. It works well for both aryl and alkyl disulfides. Moreover, the resultant products can be converted into 8-(hetero)aryl- or alkenyl-substituted