Amberlyst-15 and Amberlite-200C: Efficient catalysts for aldol and cross-aldol condensation under ultrasound irradiation
摘要:
This paper presents an improved synthesis of trans-chalcones and alpha,alpha '-bis(arylmethylidene) cycloalkanones under ultrasound irradiation in the presence of commercial acid-resins as catalysts in solvent free conditions. Several trans-chalcones and alpha,alpha '-bis(arylmethylidene) cycloalkanones were synthesized in good yields and excellent selectivity in a short reaction time. (C) 2013 Elsevier B.V. All rights reserved.
A Novel Reaction of the “Huisgen Zwitterion” with Chalcones and Dienones: An Efficient Strategy for the Synthesis of Pyrazoline and Pyrazolopyridazine Derivatives
作者:Vijay Nair、Smitha C. Mathew、Akkattu T. Biju、Eringathodi Suresh