Autotandem Catalyst: From Acylhydrazones to <i>N</i>′,<i>N</i>′-Methylaliphatic Acylhydrazides via Transfer Hydrogenation/<i>N</i>-Methylation with Methanol Catalyzed by a Cp* Iridium Complex Bearing a Functional Ligand
作者:Shiyuan Luo、Xiangchao Xu、Peng Zhang、Qixun Shi、Xiaoguang Yang、Feng Li
DOI:10.1021/acs.orglett.2c03719
日期:2022.12.16
A new strategy for the synthesis of N′,N′-methylaliphatic acylhydrazides from acylhydrazones via transfer hydrogenation/N-methylation with methanol as both the hydrogen source and the methylating reagent has been proposed and accomplished. In the presence of [Cp*Ir(2,2′-bpyO)(H2O)] (1 mol %) and Cs2CO3 (0.3 equiv), a range of desired products were obtained in high yields. It was also confirmed that
提出并实现了以甲醇为氢源和甲基化试剂,通过转移氢化/ N-甲基化从酰肼合成N ',N'-甲基脂肪酰肼的新策略。在 [Cp*Ir(2,2'-bpyO)(H 2 O)](1 mol %)和 Cs 2 CO 3(0.3 当量)的存在下,以高产率获得了一系列所需的产物。还证实了催化剂的 bpy 配体中的功能单元对铱配合物的催化活性至关重要。还介绍了本催化体系的机理研究和实际应用。