Nickel promoted switchable hydroheteroarylation of cyclodienes via C–H bond activation of heteroarenes
作者:Wei-Chih Lee、Wei-Chin Shih、Ting-Hsuan Wang、Yuhua Liu、Glenn P.A. Yap、Tiow-Gan Ong
DOI:10.1016/j.tet.2015.03.066
日期:2015.7
hydroheteroarylation of cyclic dienes via C–H bond activation of heteroarenes. In the presence of an N-heterocyclic carbene (NHC) ligand, hydroheteroarylation of cyclic diene with azole afforded α-alkenyl-azole, forging a Heck-like product without using any external oxidant. Conversely, changing the ligand to PCy3 would switch this reaction manifold to afford the other isomeric β-alkenyl substituted azole.
我们通过杂芳烃的C–H键活化证明了Ni催化的环状二烯可切换氢杂芳基化反应。在N-杂环卡宾(NHC)配体的存在下,环二烯与吡咯的氢杂芳基化得到α-烯基-吡咯,无需使用任何外部氧化剂即可锻造Heck-like产物。相反,将配体改变为PCy 3将切换该反应歧管以提供另一种异构的β-烯基取代的唑。