C–H Bonds as Ubiquitous Functionality: Preparation of Multiple Regioisomers of Arylated 1,2,4-Triazoles via C–H Arylation
作者:Jung Min Joo、Pengfei Guo、Dalibor Sames
DOI:10.1021/jo3021677
日期:2013.1.18
We describe a general approach for the synthesis of complex aryl 1,2,4-triazoles. The electronic character of the C-H bonds and the triazole ring allows for the regioselective C-H arylation of 1-alkyl- and 4-alkyltriazoles under catalytic conditions. We have also developed the SEM and THP switch as well as trans-N-alkylation, which enable sequential arylation of the triazole ring to prepare 3,5-diaryltriazoles. This new strategy provides rapid access to a variety of arylated 1,2,4-triazoles and well complements existing cyclization methods.