Nickel nanoparticles: A highly efficient catalyst for one pot synthesis of tetraketones and biscoumarins
作者:JITENDER M. KHURANA、KANIKA VIJ
DOI:10.1007/s12039-012-0275-8
日期:2012.7
nickel nanoparticles have been used as a catalyst for promoting the synthesis of 2,2′-aryl-methylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one), 2,2′-aryl-methylene bis(3-hydroxy-2-cyclohexene-1-one), also known as tetraketones, and biscoumarins via Knoevenagel condensation followed by rapid Michael addition. A novel and highly efficient PVP stabilized Ni nanoparticle catalysed synthesis of tetraketones
efficient, simple, and ecologically benign method for their preparation in the presence of the novel catalytic agent is still in great demand. In the present report, direct crystals of 2,2′-(arylmethylene)bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) (a tetraketone) were obtained via a simple procedure using 2-aminopyrazine as a catalyst. The prepared compound shows significant antioxidant checked by different
Green synthesis of tetraketones: crystal structure, DFT studies and Hirshfeld surface analysis of 2,2′-((3,4-dimethoxyphenyl) methylene) bis(3-hydroxy-5,5-dimethylcyclohex2-enone)
Abstract The present work deals with a practically efficient protocol designed for the synthesis of tetraketones using ultrasound in the presence of boric acid as the catalyst. One of the tetraketone, (3a) was confirmed by crystallographic studies. The molecules in crystal lattice are held together by weak intermolecular C–H···O, C–H···π and intramolecular O–H···O interactions. Hirshfeld surface analysis