Cross-Dehydrogenative N–N Coupling of Aromatic and Aliphatic Methoxyamides with Benzotriazoles
作者:Pooja Y. Vemuri、Frederic W. Patureau
DOI:10.1021/acs.orglett.1c01034
日期:2021.5.21
are ubiquitous in bioactive compounds and organic materials. However, intermolecular hetero-selective N–H/N–H oxidative coupling reactions remain very challenging and largely unexplored. Here, we report an unprecedented, simple and hetero-selective cross-dehydrogenative N–N coupling of amides and benzotriazoles, utilizing only a hypervalent iodine species as the terminal oxidant. The scope and mechanistic
Rh(III)-Catalyzed Tandem [4+2] Annulation To Construct Functional Dihydroisoquinolinones
作者:Lin Dong、Jia-Hui Yang
DOI:10.1055/a-1787-3958
日期:2022.7
A highly efficient Rh(III)-catalyzedtandem [4+2] annulation to construct functional dihydroisoquinolinone derivatives with an alkenyl side chain by insertion into an N–O bond as an internal oxidation process has been achieved. A wide range of 1,3-dienes as the coupling partners makes this simple methodology even more useful.
Hydroxyamination of aryl C–H bonds with N-hydroxycarbamate by synergistic Rh/Cu catalysis at room temperature
作者:Wei Yang、Jiaqiong Sun、Xianxiu Xu、Qian Zhang、Qun Liu
DOI:10.1039/c3cc49496a
日期:——
A novel hydroamination of aryl CâH bonds has been accomplished using N-Boc-hydroxyamine via synergistic combination of rhodium and copper catalysis. The merger of two robust catalytic systems has allowed for the development of a mild and sustainable protocol for the direct formation of benzo[c]isoxazol-3(1H)-ones.
Visible-Light-Induced Radical Cascade Cross-Coupling via C(sp<sup>3</sup>)–H Activation and C–N/N–O Cleavage: Feasible Access to Methylenebisamide Derivatives
作者:Jinglan Lei、Min Li、Qingqing Zhang、Shuyang Liu、Haifang Li、Lei Shi、Wen-Feng Jiang、Chunying Duan、Yunhe Jin
DOI:10.1021/acs.orglett.3c00646
日期:——
Here we report facile and manipulable access to methylenebisamidederivativesvia visible-light-driven radicalcascade processes incorporating C(sp3)–Hactivation and C–N/N–Ocleavage. Mechanistic studies reveal that a traditional Ir-catalyzed photoredox pathway and a novel copper-induced complex-photolysis pathway are both involved, contributing to activating the inert N-methoxyamides and rendering
在这里,我们报告了通过包含 C(sp 3 )–H 激活和 C–N/N–O 裂解的可见光驱动的自由基级联过程,轻松且可操作地获取亚甲基双酰胺衍生物。机理研究表明,传统的 Ir 催化光氧化还原途径和新型铜诱导的复合光解途径均参与其中,有助于激活惰性N-甲氧基酰胺并提供有价值的双酰胺。这种方法具有许多优点,包括温和的反应条件、广泛的范围和官能团耐受性以及具有竞争力的步骤经济性。鉴于机械的丰富性和操作的简单性,我们相信这个一揽子交易为合成有价值的含氮分子铺平了一条有前途的道路。