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.
Puri
Saurabh
S
Department of Chemistry, Punjabi University, Patiala-147002 (Pb.), India. saurabh3980@yahoo.co.in
Kaur
Balbir
B
Parmar
Anupama
A
Kumar
Harish
H
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