Herein, a base‐controlled protocol was developed for the C−N coupling of primary amines and 2‐chlorobenzimidazoles, affording a handful of secondary or tertiary amines in a selective fashion. Moreover, this protocol was realized under transition‐metal‐free conditions, and the variation of the base from iPr2NH to LiOtBu completely switched the selectivity from monoarylation to diarylation. Further investigations
本文中,开发了一种碱控制的方案,用于伯胺和2-氯苯并咪唑的C-N偶联,以选择性方式提供了少量仲胺或叔胺。此外,该方案是在无过渡金属条件下实现的,碱从i Pr 2 NH到LiO t Bu的变化完全将选择性从单芳基化转变为二芳基化。进一步的研究表明,所用碱的种类,内在的碱性和数量极大地影响了这些反应。