Base-mediated benzannulation of α-cyanocrotonates with ynones: facile synthesis of benzonitriles and fluorenes
作者:Maneesh Kumar Reddy Singam、Attunuri Nagireddy、Sridhar Reddy Maddi
DOI:10.1039/d0gc00608d
日期:——
Benzonitriles and cyanofluorenes have been rapidly obtained via the [3 + 3] benzannulation of readily available alkynones and α-cyanocrotonates using KOtBu as the only reagent and EtOH (and CO2) is the only by-product.
A General Palladium-Catalyzed Carbonylative Sonogashira Coupling of Aryl Triflates
作者:Xiao-Feng Wu、Basker Sundararaju、Helfried Neumann、Pierre H. Dixneuf、Matthias Beller
DOI:10.1002/chem.201002653
日期:2011.1.3
Trifling with triflates: A new protocol for the carbonylativeSonogashira reactions of aryl triflates (see scheme) that provides a significant extension of this interesting methodology is described.
Cu-Catalyzed Diarylthiolation of Ynones with Aryl Iodides and Elemental Sulfur: An Access to Tetrasubstituted (<i>Z</i>)-1,2-Bis(arylthio)alkenes and Benzo[<i>b</i>][1,4]dithiines
A copper-catalyzedthree-componentreaction of ynones, aryl iodides, and elemental sulfur via a syn-addition process is established. The reaction features operational practicality, broad substrate scope, and readily accessible scale-up synthesis by affording a series of (Z)-1,2-bis(arylthio)alkenes in good to excellent yield. Moreover, benzo[b][1,4]dithiines can be also constructed efficiently by using
建立了铜催化的炔酮、芳基碘化物和元素硫通过顺式加成过程的三组分反应。该反应具有操作实用性、底物范围广和易于放大合成的特点,可提供一系列 ( Z )-1,2-双(芳硫基)烯烃,收率良好。此外,苯并[ b ][1,4]二硫因还可以通过使用1,2-二碘苯作为偶联伙伴有效地构建。