A three-componentcoupling of arynes, aminosilanes, and aldehydes enables diverse amino and hydroxymethyl groups to be incorporated directly into 1,2-positions of aromatic rings.
芳烃,氨基硅烷和醛的三组分偶联使得各种氨基和羟甲基可以直接引入芳香环的1,2-位。
Lewis acid mediated, mild C–H aminoalkylation of azoles <i>via</i> three component coupling
作者:Marion H. Emmert、Cyndi Qixin He、Akshay A. Shah、Stephanie Felten
DOI:10.1039/d0sc06868c
日期:——
several diversified products at the same time. Overall, the presented work enables a metal-free approach to azole C–H functionalization via Lewisacidmediated azole C–H deprotonation, demonstrating the potential of a readily available, Si-based Lewisacid to mediate new C–C bond formations.
该手稿报告了通过三组分偶联方法开发的一种温和的,高度官能团耐受的,无金属的唑类C–H氨基烷基化方法。这种方法可以使各种唑底物的C–H功能化,例如恶唑,苯并恶唑,噻唑,苯并噻唑,咪唑和苯并咪唑。DFT计算确定了反应机理中的关键去质子平衡。使用DFT作为预测工具,可以通过原位保护/活化基团策略使最初未反应的底物(咪唑/苯并咪唑)的C–H氨基烷基化。DFT支持的机制途径提出了唑底物和路易斯酸/碱对TBSOTf / EtN i Pr 2之间的关键相互作用通过去质子化作用导致吡咯活化,然后在卡宾中间体和亚胺基亲电子试剂之间形成C–C键。展示了两种不同的方法来探索胺底物的范围:(i)DFT指导的胺成分预测分析,该分析将反应性与计算的过渡态结构中亚胺中间体的变形相关;(ii)并行的药物化学工作流程,可以同时合成和分离多种产品。总的来说,本文提出的工作使通过路易斯酸介导的唑CH脱质子化的无金属方法实现了唑
Preparation, Characterization, and Reactivity of Aliphatic Amino Iodane(III) Reagents
The preparation and X‐ray structural characterization of aliphatic amino iodane (III) reagents has been realized. These new reagents could be used for the Cu‐catalyzed directed electrophilic amination of aryl amines.