One-pot synthesis of substituted indolines via a copper-catalyzed sequential multicomponent/C–N coupling reaction
作者:Hongwei Jin、Bingwei Zhou、Zhi Wu、Yang Shen、Yanguang Wang
DOI:10.1016/j.tet.2010.11.094
日期:2011.2
One-pot synthesis of 2-(N-sulfonylimino)indolines has been developed. The procedure combines the copper-catalyzed three-component reaction of sulfonyl azides, o-bromophenylacetylenes, and amines and the copper-catalyzed intramolecular C–N coupling in one sequence, which afforded the products in moderate to good yields. The resulting 2-(N-sulfonylimino)indolines could be easily transformed to pharmaceutically
Atroposelective Synthesis of Axially Chiral 4-Aryl α-Carbolines via <i>N</i>-Heterocyclic Carbene Catalysis
作者:Rui Ma、Xiaoxue Wang、Qiaoyu Zhang、Lei Chen、Jian Gao、Jie Feng、Donghui Wei、Ding Du
DOI:10.1021/acs.orglett.1c01221
日期:2021.6.4
functional theory calculations were also conducted to illuminate the key factors for controlling the origin of the enantioselectivity. This strategy not only provides an efficient pathway to access axially chiral α-carboline atropisomers but also offers a novel catalyticenantioselective mode for the construction of axially chiral heterobiaryls by using NHC-bound alkynyl acylazoliums.
A New Route to Indolines by the Cu-Catalyzed Cyclization Reaction of 2-Ethynylanilines with Sulfonyl Azides
作者:Eun Jeong Yoo、Sukbok Chang
DOI:10.1021/ol800049b
日期:2008.3.1
It is revealed that 2-sulfonyliminoindolines can be efficiently synthesized by the Cu-catalyzed cyclization reaction of N-alkyl- or aryl-substituted 2-ethynylanilines with sulfonyl azides. This newroute to the indoline derivatives is characterized by mild reaction conditions, facile introduction of functional groups at the 2-position of the indoline ring, and the wide substrate scope. Selective transformation
chemodivergent synthesis of α-carbolines 1 via palladium catalyzed [3+3] annulations of tosyliminoindolines 6 with α, β-unsaturated aldehydes 7 is described. Mechanistically, this cascade reaction proceeds through either a carba-Michael (in DMF) or aza-Michael (in NMA) pathway followed by intramolecular cyclization of the intermediate. A preliminary photo-physical study on selected products is also