A green, efficient and mild one-potsynthesis of pyrano[3,2-b]pyran derivatives via a three component reaction in the ionicliquid [bmim]BF4 is reported. This method has the advantages of environmental friendliness, operational simplicity, high yields and reuse of the ionicliquid.
s-Triazinium-based ionic liquid immobilized on silica-coated Fe3O4 magnetic nanoparticles: an efficient and magnetically separable heterogeneous catalyst for synthesis of 2-amino-4,8-dihydropyrano[3,2-b]pyran-3-carbonitrile derivatives for antioxidant and antifungal evaluation studies
method, vibrating sample magnetometery and thermo-gravimetric analysis. These nanoparticles were identified as an efficientcatalyst for one-pot three-component synthesis of 4,8-dihydropyrano[3,2-b]pyran derivatives in excellent yields. The catalyst was easily separated by magnetic decantation, and the recoverednanoparticles were reused for four fresh runs without any significant loss of catalytic activity