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。
Microwave-Assisted One-Pot Synthesis of Isoquinolines, Furopyridines, and Thienopyridines by Palladium-Catalyzed Sequential Coupling–Imination–Annulation of 2-Bromoarylaldehydes with Terminal Acetylenes and Ammonium Acetate
A palladium-catalyzed microwave-assisted one-pot reaction for the synthesis of isoquinolines is developed. The reaction is carried out by sequential coupling–imination–annulation reactions of ortho-bromoarylaldehydes and terminal alkynes with ammonium acetate, and a variety of substituted isoquinolines, furopyridines, and thienopyridines is prepared in moderate to excellent yields (up to 86%).
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