title: Ionic modified crosslinked salep: a highly loaded and efficient heterogeneous organocatalyst.
abstract: In this work, a novel heterogeneous organocatalyst was synthesized by immobilization of hydroxide ions on the modified salep as a natural polymer. Because of the grafting of ionic polymer chains onto the salep backbone, catalyst has high loading level of hydroxide ions (3.01 mmol/g). The resulting catalyst shows excellent activity in the synthesis of 4H-benzo[b]pyrans in water at room temperature in short reaction times. The present catalyst and protocol represent a simple, ecologically safe and cost-effective route to synthesize 4H-benzo[b]pyrans with high product yield, as well as easy catalyst recycling.
authors: Polymer Research Laboratory, Department of Chemistry, Sharif University of Technology, Tehran, Iran. purjavad@sharif.edu
authors: Ali
authors: A
authors: Pourjavadi
authors: Seyed Hassan
authors: SH
authors: Hosseini
authors: Seyed Mahmoud
authors: SM
authors: Fakoorpoor
mesh_terms: D002384:Catalysis; D005433:Flour; D055772:Green Chemistry Technology; D006878:Hydroxides / Q000737:chemistry; D029595:Orchidaceae / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry
chemical_list: D006878:Hydroxides; D009930:Organic Chemicals; D011108:Polymers