Palladium‐Catalyzed Intermolecular Dicarbofunctionalization of Unactivated Alkenes: Synthesis of Fluoroalkylated Heterocycles with All‐Carbon Quaternary Centers
The redox-neutral Pd-catalyzed dicarbofunctionalization of unactivatedalkenes with a variety of functionalized perfluoroalkyl halide is presented. This transformation enables the assembly of diversified fluoroalkylated pyrrolo[1,2-a]indoles with one all-carbon quaternary center in high regioselectivity. Mechanistic studies suggest the generation of perfluoroalkyl radicals from the single electron
Radical Cascade Cyclization of Unactivated Alkene-Tethered Indoles with Aryldiazonium Salt and Sodium Metabisulfite to Access Azo- and Sulfonylated-2,3-Dihyro-1<i>H</i>-pyrrolo[1,2-<i>a</i>]indoles
作者:Pawan Kumar、Archana Rai、Manish Kumar、Gamidi Rama Krishna、Utpal Das
DOI:10.1021/acs.joc.3c00759
日期:2023.7.7
construction of heterocyclicscaffold 2,3-dihyro-1H-pyrrolo[1,2-a]indoles via arylsulfonyl radical-triggered cascadecyclization of unactivated alkene-tethered indoles in the absence of any external photocatalyst has been developed. This protocol features easily accessible starting materials such as sodium metabisulfite and aryldiazonium tetrafluoroborates at room temperature and offers good functional group
Iron-Mediated Hydrogen Atom Transfer Radical Cyclization of Alkenyl Indoles and Pyrroles Gives Their Fused Derivatives: Total Synthesis of Bruceolline E and H
作者:Santosh J. Gharpure、Rupali S. Chavan、Simran R. Narang
DOI:10.1021/acs.orglett.4c00032
日期:2024.6.7
employed for the synthesis of dihydropyrroloindoles and dihydropyrrolizines via 5-exo-trig radical cyclization where indoles and pyrroles are used as an acceptor. This radical approach has also been extended for the synthesis of tetrahydrocyclopenta[b]indolones via the Baldwin-disfavored 5-endo-trig cyclization pathway. The formal synthesis of bruceolline J and the totalsynthesis of bruceollines E
铁介导的氢原子转移(HAT)反应可有效地用于通过 5- exo - trig自由基环化合成二氢吡咯并吲哚和二氢吡咯嗪,其中吲哚和吡咯用作受体。这种激进的方法还被扩展到通过鲍德温不喜欢的 5- end - trig环化途径合成四氢环戊[ b ]吲哚酮。采用前一种策略,布鲁斯酚J的正式合成以及布鲁斯酚E和H的全合成都已顺利进行。