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
描述了一种新颖的铜催化的黄嘌呤和相关杂环的无碱直接硫醇化反应,其特征在于使用廉价的Cu(OAc)2 ·H 2 O作为催化剂,O 2作为清洁廉价的氧化剂,并且易于使用-处理二硫化物作为硫醇化试剂。它对于芳基和烷基二硫化物均适用。此外,通过利伯斯金德-索罗尔偶联反应,可以高收率将所得产物转化为8-(杂)芳基或烯基取代的黄嘌呤。