文摘
Sulfonated rice husk ash (RHA-SO3H), as a newly reported powerful solid acid catalyst, can be efficiently used for the promotion of the preparation of substituted quinoline derivatives via the condensation reaction between 2-aminoarylketones and α-methylene ketones. All reactions are performed under solvent-free conditions at 80 °C in high yields during short reaction times. Simple methodologies, easy work-up procedure, and easy preparation of the catalyst are other advantages of this work. Keywords Rice husk ash Sulfunated rice husk ash Solvent-free conditions Friedlander synthesis Quinolines