已经实现了由AK 2 S 2 O 8介导的喹喔啉(或苯并噻唑)与甲醇的直接交叉偶联反应,从而生成了2-喹喔啉基(或2-苯并噻唑基)甲醛二甲基乙缩醛。在酸性条件下,2-喹喔啉基甲醛二甲基乙缩醛易于以良好或优异的收率转化成2-喹喔啉基甲醛。初步的机理研究表明,该反应是通过多重键裂解和甲醇与N-杂环之间的形成而进行的,涉及双氧参与的自由基过程。该方法可以通过简单的N的交叉偶联直接合成各种2-喹喔啉基(或2-苯并噻唑基)甲醛二甲基乙缩醛。-在无醛,无酸和无过渡金属的条件下,杂环C–H键和甲醇。
demonstrated by its gram-scale and broad potential applications. Furthermore, this protocol serves as a powerful tool for the late-stage functionalization of various complex bioactive molecules and drugs to provide a new class of molecules containing two distinct bioactive molecules directly linked. Detailed mechanistic studies reveal that the current reaction goes through a novel mechanism different from
Multifold Bond Cleavage and Formation between MeOH and Quinoxalines (or Benzothiazoles): Synthesis of Carbaldehyde Dimethyl Acetals
作者:Yunkui Liu、Bo Jiang、Wei Zhang、Zhenyuan Xu
DOI:10.1021/jo302450f
日期:2013.2.1
2-quinoxalinyl (or 2-benzothiazolyl) carbaldehyde dimethyl acetals has been achieved. 2-Quinoxalinyl carbaldehyde dimethyl acetals were readily converted into 2-quinoxalinyl carbaldehydes in good to excellent yields under acidic conditions. Preliminary mechanistic studies suggest that the reaction proceeds via multifold bond cleavage and formation between methanol and N-heterocycles involving a dioxygen-participated
已经实现了由AK 2 S 2 O 8介导的喹喔啉(或苯并噻唑)与甲醇的直接交叉偶联反应,从而生成了2-喹喔啉基(或2-苯并噻唑基)甲醛二甲基乙缩醛。在酸性条件下,2-喹喔啉基甲醛二甲基乙缩醛易于以良好或优异的收率转化成2-喹喔啉基甲醛。初步的机理研究表明,该反应是通过多重键裂解和甲醇与N-杂环之间的形成而进行的,涉及双氧参与的自由基过程。该方法可以通过简单的N的交叉偶联直接合成各种2-喹喔啉基(或2-苯并噻唑基)甲醛二甲基乙缩醛。-在无醛,无酸和无过渡金属的条件下,杂环C–H键和甲醇。
Mn(I)-Catalyzed Preferential Electrophilic C3-Maleimidation in Quinoxaline Leading to Spirocyclization and Dehydrogenation of Succinimides
作者:Subhendu Ghosh、Tamanna Khandelia、Pritishree Panigrahi、Raju Mandal、Bhisma K. Patel
DOI:10.1021/acs.orglett.3c01350
日期:2023.5.26
A Mn(I)-catalyzed site-selective nondirected C3-maleimidation of quinoxaline is established. Herein, the electrophilic C3-metalation precedes over the o-directed strategy to access diversely substituted quinoxaline-appended succinimides. The products undergo PIFA-promoted C(sp2)–C(sp3) spirocyclization via π-electrons drifting from aryls and Selectfluor-mediated dehydrogenation of succinimide at room