Potassium exchanged layered zirconium phosphate as catalyst in the preparation of 4H-chromenes
摘要:
Substituted 4H-chromenes were easily prepared by reaction of salicylaldehydes and ethylcyanoacetate in solvent free conditions using potassium exchanged layered zirconium phosphate as catalyst. (c) 2005 Elsevier Ltd. All rights reserved.