Convenient ultrasound mediated synthesis of substituted pyrazolones under solvent-free conditions.
Smooth condensation of hydrazine derivatives with various beta-keto esters was performed under solvent-free conditions by using ultrasound irradiation to facilitate the formation of pyrazolone derivatives in good to excellent amounts within very short time periods.
Mojtahedi
Mohammad M
MM
Chemistry and Chemical Engineering Research Center of Iran, P.O. Box 14335-186, Tehran, Iran. mojtahedi@ccerci.ac.ir
Javadpour
Mashal
M
Abaee
M Saeed
MS