A novel photoredox-active group for the generation of fluorinated radicals from difluorostyrenes
作者:Mikhail O. Zubkov、Mikhail D. Kosobokov、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander A. Korlyukov、Jinbo Hu、Alexander D. Dilman
DOI:10.1039/c9sc04643g
日期:——
by the thiolene click reaction. It proceeds upon visible light catalysis with 9-phenylacridine providing various difluorinated sulfides as radical precursors. Single electron reduction of the C–S bond with the formation of fluoroalkyl radicals is enabled by the electron-poor azine ring. The intermediate difluorinated sulfides were involved in a series of photoredox reactions with silyl enol ethers
Reductive Bromodifluoromethylation of Nitrones Promoted by Visible Light
作者:Igor A. Dmitriev、Vyacheslav I. Supranovich、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1002/ejoc.201900274
日期:2019.7.14
A method for the synthesis of bromodifluoromethyl‐substituted hydroxylamines by reductive fluoroalkylation of nitrones with CF2Br2 is described. The reaction is promoted by visible light and employs ascorbic acid as a stoichiometric reducing agent.
One-Pot Synthesis of Benzo[<i>c</i>]phenanthridine Alkaloids from 7-Azabenzonorbornadienes and Aryl Nitrones
作者:Narasingan Aravindan、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.3c01192
日期:2023.6.2
An efficient synthesis of benzo[c]phenanthridine alkaloids via a synergistic combination of C–C bond formation and a cycloaromatization reaction is described. Aryl nitrones react with 7-azabenzonorbornadienes in the presence of a Rh(III) catalyst, providing pharmaceutically useful benzo[c]phenanthridine derivatives in good to moderate yields. Using this methodology, highly useful alkaloids such as
描述了通过 C-C 键形成和环芳构化反应的协同组合有效合成苯并 [ c ] 菲啶生物碱。在 Rh(III) 催化剂存在下,芳基硝酮与 7-氮杂苯并降冰片二烯反应,以良好至中等收率提供药学上有用的苯并 [ c ] 菲啶衍生物。使用这种方法,可以在一个步骤中制备非常有用的生物碱,例如诺法加龙宁、去甲白屈菜红碱、地卡林、去甲血根碱和去甲尼替丁。