Magnetically recoverable Fe_3O_4@SiO_2@Sm: Preparation and application in one-pot, three-component assembly of bis(phenyl-1H-pyrazol-5-ol) derivatives

摘要

An environment-friendly protocol for the synthesis of bis(phenyl-1H-pyrazol-5-ol) derivatives assisted by a magnetically recoverable catalyst, Fe_3O_4@SiO_2@Sm, has been developed. The catalyst efficiently supports a one-pot, three-component reaction between aromatic aldehydes, phenylhydrazine and ethyl acetoacetate to give corresponding products in medium to good yields. The magnetic catalyst can be recovered and reused without a significant loss in the catalytic performance.