已经报道了一种合成1,5-和1,4,5-取代的1,2,3-三唑的新方法。使用烯胺和N-甲苯磺酰肼作为原料的碘-TBHP氧化系统促进了这种方法,避免了传统方法对叠氮化物和过渡金属的依赖。通过这种方法,各种1,5-和1,4,5-取代的1,2,3-三唑以中等到高产量提供。机理研究表明,氨基交换将参与反应过程。此外,产品1-(2-甲氧基苯基)-4-甲基-1 H -1,2,3-三唑-5-羧酸甲酯是抗甲型流感药物的有用前体,并进行了进一步的应用研究。
Gold-catalyzed cascade C–H/C–H cross-coupling/cyclization/alkynylation: an efficient access to 3-alkynylpyrroles
作者:Shuai Zhang、Yuanhong Ma、Jingbo Lan、Feijie Song、Jingsong You
DOI:10.1039/c5ob00599j
日期:——
An efficient approach to 3-alkynylpyrroles has been developed through the gold-catalyzed cascade oxidative C–H/C–H cross-coupling, cyclization and in situ oxidative alkynylation.
A facile one-pot domino reaction for the stereoselective synthesis of acryl derivatives promoted by Ca(OTf)2
作者:Srinivasarao Yaragorla、Pyare Lal Saini、Abhishek Pareek、Abdulrahman I. Almansour、Natarajan Arumugam
DOI:10.1016/j.tetlet.2016.03.098
日期:2016.5
A facile one-pot domino reaction for the stereoselectivesynthesis of acryl derivatives has been reported using alkaline earth catalyst [Ca(OTf)2]. Initially aryl amine reacts with ethyl propiolate to form β-enamino ester which further reacts with aryl aldehyde and indole in the presence of Ca(OTf)2 to give indolyl acrylates. It is interesting to note that in the absence of indole the reaction leads
Three-Component Synthesis of Quinolines Based on Radical Cascade Visible-Light Photoredox Catalysis
作者:Jun-Ho Choi、Cheol-Min Park
DOI:10.1002/adsc.201800734
日期:2018.9.17
Synthesis of highly substituted quinolines has been developed based on three‐component radicalcascadebased on visible‐light photoredoxcatalysis. This tandem coupling reaction has been coordinated to proceed with high chemoselectivity based on the differential electronic properties of coupling partners. Subjection of electron‐rich β‐aminoacrylates with electron‐deficient halides and alkenes to the