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Synthesis of mono- and bis-spiro-2-amino-4H-pyrans catalyzed by S-alkyl O-hydrogen sulfothioate functionalized silica-coated magnetic nanoparticles under ultrasound irradiation

Chemical EngineeringEngineeringCatalysisMolecular CatalysisChemistrySynthesis MethodUltrasound IrradiationSilica-coated Magnetic NanoparticlesAsymmetric CatalysisSynthetic ChemistryS-alkyl O-hydrogen Sulfothioate