A general synthetic route for the synthesis of 1. 2-dihydro-1-aryl-naphtho[1. 2-e][1. 3]oxazine-3-one derivatives has been developed using perlite-SO3H nanoparticles as efficient catalyst under both microwave-assisted and thermal solvent-free conditions. https://smokeysmountainfurnitureoutlets.shop/product-category/writing-desk/