Tantalum Catalyzed Hydroaminoalkylation for the Synthesis of α- and β-Substituted <i>N</i>-Heterocycles
作者:Philippa R. Payne、Pierre Garcia、Patrick Eisenberger、Jacky C.-H. Yim、Laurel L. Schafer
DOI:10.1021/ol400729v
日期:2013.5.3
Unprotected secondary amines are directly alkylated by C–H functionalization adjacent to nitrogen, thereby opening new routes toward the synthesis of α- and β-alkylated N-heterocycles. α-Alkylated piperidine, piperazine, and azepane products are prepared from heterocycles and alkenes in an atom-economic reaction with excellent regio- and diastereoselectivity. β-Alkylated N-heterocycles are synthesized