Batting the ylides: A simple procedure carried out under mild conditions allows the direct and efficientsynthesis of structurally diverse indoles. This approach involves a cascadereaction of sulfurylides and N‐(ortho‐chloromethyl)arylamides (see scheme).
Diastereoselective Synthesis of 1,3-Diyne-Tethered Trifluoromethylcyclopropanes through a Sulfur Ylide Mediated Cyclopropanation/DBU-Mediated Epimerization Sequence
作者:Guo-Shu Chen、Xiao-Xue Yan、Shu-Jie Chen、Xiang-Yu Mao、Zhao-Dong Li、Yun-Lin Liu
DOI:10.1021/acs.joc.0c00162
日期:2020.5.15
A one-potsynthesis of 1,3-diyne-tethered trifluoromethylcyclopropanes startingfrom 2-CF3-3,5-diyne-1-enes and sulfur ylides via a sulfur ylide mediated cyclopropanation and a DBU-mediated epimerization sequence is described in this work. This process is highly diastereoselective with broad substrate scope. Moreover, a series of synthetic transformations based on the diyne moieties were conducted
Photoredox‐Catalyzed Multicomponent Cyclization of 2‐Vinyl Phenols,
<i>N</i>
‐Alkoxypyridinium Salts, and Sulfur Ylides for Synthesis of Dihydrobenzofurans
heterocycles, and their synthesis continues to attract considerable effort. Herein, a visible‐light‐driven photoredox‐catalyzed radical multicomponent cyclization of 2‐vinyl phenols, N‐alkoxypyridinium salts, and sulfur ylides is described. The key to the reaction success involves the use of both N‐alkoxypyridinium salts and sulfur ylides as radical precursors. This redox‐neutral protocol features good functional
A visible‐light‐driven radical‐mediated strategy for the in situ generation of aza‐ortho‐quinonemethides from 2‐vinyl‐substituted anilines and alkyl radical precursors is described. This process enables an efficient multicomponent reaction of 2‐vinylanilines, halides, and sulfur ylides, and has a wide substrate scope and good functional group tolerance. Treatment of the cycloaddition products with
visible light-driven photoredox-catalyzed and copper(II)-assisted three-component radical addition/hydroxylation reaction of alkenes, sulfur ylides, and water is reported. This process shows broad substrate scope and high functional group tolerance, with respect to both readily available sulfur ylides and alkenes, providing high-yielding and practical access to valuable γ-hydroxy carbonyl compounds.