6-diisopropylphenyl)acenaphthoimidazol-2-ylidene (AnIPr) with an achiral 2-naphthyl-4,4-dimethyloxazoline palladacyclic fragment. Applying this precatalyst enabled a general protocol for Pd-catalyzedC–Ncross-couplingreactions of challenging five- or six-membered ring heteroaryl chlorides and various heterocyclic amines. The desired aminated products, including commercial pharmaceuticals or key intermediates such
Iodine-Mediated One-Pot Synthesis of 2-(Piperazin-1-yl)pyrazine Derivatives from N-Alkyl Piperazines
作者:Kangping Xu、Guishan Tan、Ruihuan Liu、Yikun Wang、Yanmei Weng、Caiping Yao、Yan Zhang、Gangzhi Zhu、Xiaoai He
DOI:10.1055/s-0036-1588701
日期:——
An iodine-mediated one-pot reaction of N-alkyl piperazines is described for the first time. This transformation provides a straightforward and facile pathway to the synthesis of 2-(piperazin-1-yl)pyrazine derivatives with the corresponding N-alkyl piperazines as single material. Based on a series of control experiments, a plausible reaction mechanism has been proposed.