Visible
<scp>Light‐Promoted</scp>
Sulfoxonium Ylides Synthesis from Aryl Diazoacetates and Sulfoxides
作者:Juan Lu、Lei Li、Xiang‐Kui He、Guo‐Yong Xu、Jun Xuan
DOI:10.1002/cjoc.202100064
日期:2021.6
A visible light-promoted reaction of donor/acceptor diazoalkanes with sulfoxides towards the synthesis of synthetically useful sulfoxonium ylides was reported. The reaction occurred under sole visible light irradiation without the need of any transition-metals or additives, affording the corresponding sulfoxonium ylides in moderate to good yields. The success of late-stage modification of natural isolates
Catalyst-free, visible-light-promoted S–H insertion reaction between thiols and α-diazoesters
作者:Jingya Yang、Ganggang Wang、Shuwen Chen、Ben Ma、Hongyan Zhou、Menghui Song、Cai Liu、Congde Huo
DOI:10.1039/d0ob02006k
日期:——
A visible-light-promoted S–H insertion reaction betweenthiols and α-diazoesters was developed. The reaction proceeded smoothly at room temperature with a broad substrate scope, affording various thioethers in moderate to excellent yields. The catalyst- and additive-free nature, sustainable energy source and mild reaction conditions make this strategy more eco-friendly.
Visible-light-promoted selective <i>O</i>-alkylation of 2-pyridones with α-aryldiazoacetates
作者:Jingya Yang、Ganggang Wang、Hongyan Zhou、Zhifeng Li、Ben Ma、Menghui Song、Rongxia Sun、Congde Huo
DOI:10.1039/d0ob02350g
日期:——
A visible-light-promoted O–H insertion reaction between 2-pyridones and α-aryldiazoacetates has been developed. Upon visible light irradiation, the reaction proceeds smoothly under mild and catalyst-free conditions. A wide scope of 2-pyridones and α-aryldiazoacetates are well tolerated, and various O-alkylated 2-pyridones are obtained with perfect selectivity and good functional group tolerance. A
Divergent Synthesis of Aziridine and Imidazolidine Frameworks under Blue LED Irradiation
作者:Xiao Cheng、Bao-Gui Cai、Hui Mao、Juan Lu、Lei Li、Kun Wang、Jun Xuan
DOI:10.1021/acs.orglett.1c00979
日期:2021.6.4
We develop a visible light-promoted divergent cycloaddition of α-diazo esters with hexahydro-1,3,5-triazines, leading to a series of aziridine and imidazolidine frameworks in average good yield, by simply changing the reaction media used. It is noteworthy that the reaction occurs under sole visible light irradiation without the need for exogenous photoredox catalysts. More significantly, a reasonable
Dirhodium(II) Tetrakis[methyl 2-oxaazetidine-4-carboxylate]: A Chiral Dirhodium(II) Carboxamidate of Exceptional Reactivity and Selectivity
作者:Michael P. Doyle、Simon B. Davies、Wenhao Hu
DOI:10.1021/ol005730q
日期:2000.4.1
[formula: see text] A new chiral azetidinone-carboxylate ligand for dirhodium(II) catalysis enhances reactivity toward diazodecomposition and selectivity toward cyclopropanation enabling diazomalonates, vinyldiazoacetates, and aryldiazoacetates to be effectively used with a dirhodium(II) carboxamidate catalyst.