Ligand-free Cu2O-catalyzed cross coupling of nitrogen heterocycles with iodopyridines
作者:Yong-Chua Teo、Fui-Fong Yong、Shirlyn Sim
DOI:10.1016/j.tet.2013.06.095
日期:2013.9
A practical and efficient strategy has been developed for the cross coupling of nitrogen heterocycles with halopyridines using ligand-free Cu2O as catalyst and Cs2CO3 as the base. The protocol is applicable to a series of highly functionalised heterocycles, such as 7-azaindole, indazole, indole, imidazole, pyrrole and pyrazole, affording the N-heteroaryl derivatives in high yields (up to 96%).
已经开发了一种实用且有效的策略,用于使用无配体的Cu 2 O作为催化剂和Cs 2 CO 3作为碱将氮杂环与卤代吡啶交叉偶联。该方案适用于一系列高度官能化的杂环,例如7-氮杂吲哚,吲唑,吲哚,咪唑,吡咯和吡唑,可提供高收率的N-杂芳基衍生物(最高96%)。