Dearomatization‐Enabled Visible‐Light‐Induced 1,2‐Alkylsulfonylation of Alkenes Using Sodium Sulfinates and Pyridinium Salts
作者:Yuan Yang、Chong‐Hui Xu、Fan Teng、Jin‐Heng Li
DOI:10.1002/adsc.202000457
日期:2020.8.19
We demonstrate a three‐component 1,2‐alkylsulfonylation of alkenes using sodium sulfinates and pyridiniumsalts through visible light photoredox catalysis, wherein heteroarenium salts are harnessed as radical acceptors via dearomatization. This reaction allows the simultaneous incorporation of sulfonyl and 1,4‐dihydropyridine groups across the C=C bonds to access various sulfonyl‐containing 1,4‐dihydropyridine
Visible light photoredox alkylazidation of alkenes with sodium azide and heteroarenium salts: entry to azido-containing 1,4-dihydropyridines
作者:Yuan Yang、Chong-Hui Xu、Zhi-Qiang Xiong、Jin-Heng Li
DOI:10.1039/d0cc03235b
日期:——
A three-component alkene alkylazidation using sodium azide as the azido resource and heteroarenium salts as functionalized alkyl reagents for producing highly valuable 2-azido-1-(1,4-dihydropyridin-4-yl)-ethanes is described. This reaction allows the incorporation of both an azido group and a 1,4-dihydropyridin-4-yl group across CC bonds to construct two new bonds in a single reaction step, and represents
Merging Photoredox/Nickel Catalysis for Cross-Electrophile Coupling of Aziridines with Pyridin-1-ium Salts via Dearomatization
作者:Chong-Hui Xu、Jin-Heng Li、Jian-Nan Xiang、Wei Deng
DOI:10.1021/acs.orglett.1c01077
日期:2021.5.7
Merging photoredox/nickel catalysis enabling the cross-electrophile coupling of aziridines with pyridin-1-ium salts involving dearomatization for the synthesis of β-(1,4-dihydropyridin-4-yl)-ethylamines, especially including bioactive motif-based analogues, is described. This method allows incorporation of a 1,4-dihydropyridin-4-yl group and formation a N–H amino group to construct highly valuable
The non-chain radicaloid c-alkylation of nitronate anions: further evidence for the mechanism
作者:Alan R. Katritzky、Jen-luan Chen、Charles M. Marson、Angelamaria Maia、M.Akram Kashmiri
DOI:10.1016/s0040-4020(01)87407-x
日期:1986.1
The effects of the variation of solvent, pyridinium leaving group, -substituent, and nitronate nucleophile have been studied in the -alkylation of nitronateanions. These variations and studies of the effects of inhibitors, attempted entrainment reactions, and ESR work are all in accord with our previously suggested mechanism.