Picolinamide Ligands: Nickel‐Catalyzed Reductive Cross‐Coupling of Aryl Bromides with Bromocyclopropane and Beyond
作者:Dongyang Han、Jie Sun、Jian Jin
DOI:10.1002/asia.202201132
日期:2023.1.17
The arylcyclopropane motif as the combination of aryl and cyclopropyl ring systems can be found in an increasing amount of approved and investigational drugs. Herein, we have developed a mild, efficient nickel-catalyzed reductive cross-coupling protocol, featuring a simple Ni(II) precatalyst, a novel picolinamide NN2 pincer ligand. Notably, the reaction is tolerant of a broad range of functionalities
芳基环丙烷基序作为芳基和环丙基环系统的组合,可以在越来越多的批准和研究药物中找到。在此,我们开发了一种温和、高效的镍催化还原交叉偶联方案,其特点是一种简单的 Ni(II) 预催化剂,一种新型吡啶酰胺 NN 2钳形配体。值得注意的是,该反应对包括游离胺在内的广泛功能具有耐受性。
Direct Photoexcitable Iodomethylborate Enabling Cyclopropanation of Reactive Alkenes
作者:Rikako Nakamura、Yuto Sumida、Hirohisa Ohmiya
DOI:10.1246/bcsj.20220112
日期:2022.7.15
Radical-mediated cyclopropanation tool for reactive alkenes including dehydroamino acids (DHAAs) has been developed based on directly photoexcitable borate generating iodomethyl radical under visible light irradiation. The borate at the excited state serves as a strong single electron reductant. Therefore, this photoexcitable borate offers a simple protocol for cyclopropanation of DHAAs to forge m