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。
Visible light promoted tandem dehydrogenation-deaminative cyclocondensation under aerobic conditions for the synthesis of 2-aryl benzimidazoles/quinoxalines from <i>ortho</i>-phenylenediamines and arylmethyl/ethyl amines
作者:Firdoos Ahmad Sofi、Rohit Sharma、Ravi Rawat、Asit K. Chakraborti、Prasad V. Bharatam
DOI:10.1039/d0nj03002c
日期:——
Visible light promoted dominosynthesis of 2-aryl benzimidazoles is reported through the reaction of ortho-phenylenediamines and arylmethyl amines underaerobicconditions. The methodology has wide substrate scope and tolerates a wide range of functional groups affording the products in high yields. The use of arylethyl amines instead of arylmethyl amines gives 2-aryl quinoxalines.
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。