Synthesis of Annulated 2<i>H</i>-Indazoles and 1,2,3- and 1,2,4-Triazoles via a One-Pot Palladium-Catalyzed Alkylation/Direct Arylation Reaction
作者:Benoît Laleu、Mark Lautens
DOI:10.1021/jo8017236
日期:2008.11.21
A variety of six-membered-ring annulated 2H-indazoles and 1,2,3- and 1,2,4-triazoles were synthesized in good to excellent yields from the corresponding bromoethyl azoles and aryl iodides. The annulation process involves a one-pot norbornene-mediated palladium-catalyzed sequence whereby an alkyl-aryl bond and an aryl-heteroaryl bond are successively formed through two C-H bond activations. Subsequent
从相应的溴乙基唑和芳基碘化物以良好至优异的收率合成了多种六元环环状的2H-吲唑以及1,2,3-和1,2,4-三唑。环合过程涉及一锅降冰片烯介导的钯催化的序列,其中烷基-芳基键和芳基-杂芳基键通过两次CH键激活连续形成。还介绍了通过交叉偶联反应对所得多环化合物的后续官能化作用。