Traceless heterocycle synthesis based on transition-metal-catalyzed C-H functionalization is synthetically appealing but has been realized only in monodentate directing systems. Bidentate directing systems allow for the achievement of high catalytic reactivity without the need for a high-cost privileged ligand. The first bidentate directing-enabled, traceless heterocycle synthesis is demonstrated in the
An efficient rhodium(III)-catalyzed C–H activation followed by intermolecular annulation between enamides and sulfoxonium ylides has been developed. The transformation proceeds smoothly with a broad range of substrates, affording a series of isoquinoline derivatives in moderate to good yields under additive-free conditions.
已经开发出一种高效的铑 ( III ) 催化的 C-H 活化,然后在烯酰胺和亚砜叶立德之间进行分子间成环。该转化可在多种底物中顺利进行,在无添加剂的条件下以中等至良好的产率提供一系列异喹啉衍生物。
Copper-Catalyzed Nitrogen Atom Transfer to Isoquinolines via C–N Triple Bond Cleavage and Three-Component Cyclization
A copper(I)-catalyzed tandemreaction of 2-bromoaryl ketones, terminal alkynes, and CH3CN is developed, which combines N atom transfer and three-component [3 + 2 + 1] cyclization, and efficiently produces densely functionalized isoquinolines in a facile, highlyselective, and general manner. In the reaction, the formation of aromatic C–N bonds along with the complete C–N triple bond cleavage is first
Free Amine-Directed Ru(II)-Catalyzed Redox-Neutral [4 + 2] C–H Activation/Annulation of Benzylamines with Sulfoxonium Ylides
作者:Yogesh N. Aher、Amit B. Pawar
DOI:10.1021/acs.joc.2c00931
日期:2022.10.7
An externaloxidantfree Ru(II)-catalyzed C–Hfunctionalization/annulation of primary benzylamines with sulfoxonium ylides has been developed for the synthesis of isoquinolines. The reaction utilizes free amine as a directing group, which is generally considered to be a poor directing group. This work presents the first example of Ru-catalyzed C–Hfunctionalization of benzylamines under redox-neutral