Modular Access to Ketones via Cooperative NHC/Pd-Catalyzed C–H Alkylation of Aldehydes with Alkyl Bromides
作者:Ying Huang、You-Feng Han、Chun-Lin Zhang、Song Ye
DOI:10.1021/acscatal.3c02844
日期:2023.8.18
Direct C–H alkylation of aldehydes represents a straightforward and step-economy strategy for modular access to ketones. Herein, we report a direct C–H alkylation of aldehydes with alkyl bromides to generate ketones under cooperative NHC/Pd catalysis at room temperature. Secondary and the difficult-to-obtain tertiary alkyl-derived ketones could be prepared through this simple process under mild conditions
醛的直接 C-H 烷基化代表了一种直接、分步经济的模块化获取酮的策略。在此,我们报道了在室温下 NHC/Pd 协同催化下,醛与烷基溴的直接 C-H 烷基化反应生成酮。仲烷基酮和难以获得的叔烷基衍生酮可以通过这个简单的过程在温和的条件下制备。机理研究支持在 NHC/Pd 协同催化下生成烷基和羰基自由基以及随后的自由基-自由基耦合的途径。