Reductive Alkylation of Azides and Nitroarenes with Alcohols: A Selective Route to Mono- and Dialkylated Amines
作者:Ishani Borthakur、Milan Maji、Abhisek Joshi、Sabuj Kundu
DOI:10.1021/acs.joc.1c02625
日期:2022.1.7
Herein, we demonstrated an efficient protocol for reductive alkylation of azides/nitro compounds via a borrowing hydrogen (BH) method. By following this protocol, selective mono- and dialkylated amines were obtained under mild and solvent-free conditions. A series of control experiments and deuterium-labeling experiments were performed to understand this catalytic process. Mechanistic studies suggested
在这里,我们展示了一种通过借氢 (BH) 方法对叠氮化物/硝基化合物进行还原烷基化的有效方案。通过遵循该协议,在温和且无溶剂的条件下获得了选择性的单烷基化胺和二烷基化胺。进行了一系列对照实验和氘标记实验以了解这一催化过程。机理研究表明,Ir(III)-H 是该反应的活性中间体。KIE 研究表明,酒精的 C-H 键断裂可能是限速步骤。值得注意的是,这种无溶剂策略揭示了大约 5600 的高 TON。基于动力学研究和控制实验,提出了一种金属-配体协同机制。