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