Efficient visible light mediated synthesis of quinolin-2(1<i>H</i>)-ones from quinoline<i>N</i>-oxides
作者:Susanta Mandal、Samuzal Bhuyan、Saibal Jana、Jagir Hossain、Karan Chhetri、Biswajit Gopal Roy
DOI:10.1039/d1gc01460a
日期:——
Quinolin-2(1H)-ones are one of the important classes of compounds due to their prevalence in natural products and in pharmacologically useful compounds. Here we present an unconventional and hitherto unknown photocatalytic approach to their synthesis from easily available quinoline-N-oxides. This reagent free highly atom economical photocatalytic method, with low catalyst loading, high yield and no
Palladium-Catalyzed, <i>ortho</i>-Selective C–H Halogenation of Benzyl Nitriles, Aryl Weinreb Amides, and Anilides
作者:Riki Das、Manmohan Kapur
DOI:10.1021/acs.joc.6b02731
日期:2017.1.20
ortho-selective C–H halogenation methodology is reported herein. The highlight of the work is the highly selective C(sp2)–H functionalization of benzyl nitriles in the presence of activated C(sp3)–H bond, which results in good yields of the halogenated products with excellent regioselectivity. Along with benzyl nitriles, aryl Weinrebamides and anilides have been evaluated for the transformation using aprotic
Generating Active “L-Pd(0)” via Neutral or Cationic π-Allylpalladium Complexes Featuring Biaryl/Bipyrazolylphosphines: Synthetic, Mechanistic, and Structure–Activity Studies in Challenging Cross-Coupling Reactions
作者:A. J. DeAngelis、Peter G. Gildner、Ruishan Chow、Thomas J. Colacot
DOI:10.1021/acs.joc.5b01005
日期:2015.7.2
are efficient for a wide array of challenging C–C and C–X (X = heteroatom) cross-coupling reactions. Their high activity is correlated to their facile activation to a 12-electron-based “L-Pd(0)” catalystunder commonly employed conditions for cross-coupling reactions, noninhibitory byproduct release upon activation, and suppression of the off-cycle pathway to form dinuclear (μ-allyl)(μ-Cl)Pd2(L)2 species