Ultrasound-promoted greener synthesis of 2H-chromen-2-ones catalyzed by copper perchlorate in solventless media.
Copper perchlorate is found to be a heterogeneous catalyst for an efficient and greener synthesis of 4-substituted 2H-chromen-2-ones via von Pechmann condensation of substituted phenols and beta-keto esters in solventless media with excellent yields using ultrasound irradiation. The present methodology offers several advantages such as excellent yields, simple procedure and milder conditions.
Department of Chemistry, Punjabi University, Patiala-147002 (Pb.), India. saurabh3980@yahoo.co.in
Saurabh
S
Puri
Balbir
B
Kaur
Anupama
A
Parmar
Harish
H
Kumar
D002384:Catalysis; D002867:Chromones / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D055772:Green Chemistry Technology / Q000379:methods*; D010472:Perchlorates / Q000737:chemistry*; D012997:Solvents; D014465:Ultrasonics
D002867:Chromones; D010472:Perchlorates; D012997:Solvents; C062280:copper(II) perchlorate; D003300:Copper