A hydroarylativecoupling of internalalkynes with indolines and tetrahydroquinolines has been developed using the bench‐stable and inexpensive ruthenium (II) catalyst. The applicability of this methodology has been demonstrated by the late stage functionalization of natural products, biologically active molecules, and APIs.
Ru(II)-Catalyzed C–H Amidation of Indoline at the C7-Position Using Dioxazolone as an Amidating Agent: Synthesis of 7-Amino Indoline Scaffold
作者:Akshay Ekanath Hande、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.joc.7b02500
日期:2017.12.15
The Ru(II)-catalyzed C–H amidation of indoline at the C7-position en route for synthesizing the 7-amino indole scaffold has been achieved by using dioxazolone, which is an environmentally benign amidating reagent. This protocol paves the way for synthesizing a variety of 7-amino indole derivatives in excellent yields at ambient reaction conditions. The readily cleavable amide group has been utilized
Direct and site-selective Pd(<scp>ii</scp>)-catalyzed C-7 arylation of indolines with arylsilanes
作者:Haiqing Luo、Haidong Liu、Zhipeng Zhang、Yifan Xiao、Sihui Wang、Xuzhong Luo、Kejun Wang
DOI:10.1039/c6ra06915k
日期:——
The palladium-catalyzedoxidative arylation of indolines with arylsilanes at the C-7 position via C–H bond activation has been reported. This transformation has been applied to a wide range of substrates. It represents a facile access to C-7 arylated indolines, which can be conveniently transformed into C-7 arylated indoles.
A palladium catalyzed directinggroup assisted cross-coupling of aliphatic aziridines with indole, indoline, tetrahydroquinoline, and aniline has been developed to furnish the corresponding β-arylethylamine derivatives. The substrate scope was very general, and the protocol was also tolerated in the presence of various external additives. Control experiments suggested that the C–H cleavage step is
Cobalt Catalyzed Hydroarylation of Michael Acceptors with Indolines Directed by a Weakly Coordinating Functional Group
作者:Shyam Kumar Banjare、Rajesh Chebolu、P. C. Ravikumar
DOI:10.1021/acs.orglett.9b01228
日期:2019.6.7
A cobalt(III) catalyzed hydroarylation of Michael acceptors using indolines, selectively at the C-7 position, has been reported. For the selective C-7 functionalization of indoline, we have used a weakly coordinating amide carbonyl group. During the process of optimization, we have also discovered the unusual cocatalytic activity of zinc triflate in the C–H functionalization reaction. Hydroarylation