Nucleophilic C–H Etherification of Heteroarenes Enabled by Base-Catalyzed Halogen Transfer
作者:Thomas R. Puleo、Danielle R. Klaus、Jeffrey S. Bandar
DOI:10.1021/jacs.1c06481
日期:2021.8.18
for the direct C–H etherification of N-heteroarenes. Potassium tert-butoxide catalyzes halogen transfer from 2-halothiophenes to N-heteroarenes to form N-heteroaryl halide intermediates that undergo tandem base-promoted alcohol substitution. Thus, the simple inclusion of inexpensive 2-halothiophenes enables regioselective oxidative coupling of alcohols with 1,3-azoles, pyridines, diazines, and polyazines
我们报告了N-杂芳烃直接 C-H 醚化的一般方案。叔丁醇钾催化卤素从 2-卤代噻吩转移到N-杂芳烃以形成N-杂芳基卤化物中间体,该中间体经历串联碱促进的醇取代。因此,简单地包含廉价的 2-卤代噻吩能够在碱性反应条件下实现醇与 1,3-唑、吡啶、二嗪和多嗪的区域选择性氧化偶联。