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In this work, twenty new polysubstituted propargylamine analogs were produced in good to excellent yields via one‐step reaction of alkynes, aromatic aldehydes, and cyclic secondary amines using CuCl2 in DMF under ultrasound irradiation at 80 °C. Twelve compounds having both quinazoline building block and propargylamine scaffolds were synthesized. [ABSTRACT FROM AUTHOR]

Copper(I) catalysed oxidative conversion of imidazopyridines into N‐pyridinylamides has been achieved via tandem C−C and C−N bond cleavages under oxidative reaction conditions. The methodology has wide substrate scope and products were formed in good to excellent yields. This method is suitable for the oxidative conversion of both C‐3 functionalized as well as non‐functionalized imidazopyridines [ABSTRACT FROM AUTHOR]

Porous carbon material has been widely used as the electrode material for supercapacitor owing to distinctive advantages of high electrical conductivity, low cost and availability at ease. In this study, rice‐husk‐derived porous carbon (RHPC) is successfully prepared by employing a new activation agent copper chloride (CuCl2). The morphology and porous structure of RHPC are characterized by scanning electron microscope and N2 adsorption/desorption. The electrochemical performances of RHPC are investigated by alvanostatic charge‐discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The RHPC possesses high porosity and large specific surface area. When used as supercapacitor electrode materials, RHPC exhibits high specific capacitance of 165.23 F⋅g−1 at a current density of 0.5 A⋅g−1, excellent cycle stability and noticeable high‐rate capacity of 151.69 F⋅g−1 even at a high current density of 20 A⋅g−1. More importantly, the preparation of this CuCl2 activator is facile and low‐cost. Besides, the recyclability meet the requirements of environmental concerns. A general method has been developed to prepare hierarchical porous carbon from biomass for supercapacitor applications. The CuCl2 activator convert the precursor into porous structure by etching carbon materials through a redox reaction The rice‐huck‐derived porous carbon (RHPC) possess hierarchical porous structure combined with micropores, mesopores and macropores, preserving the original excellent structure of RH. In additional, yielded RHPC with high specific capacitance,noticeable rate performance and long‐term cycle stability. [ABSTRACT FROM AUTHOR]