Pechmann condensation reaction of 3-hydroxyphenol and ethyl acetoacetate in the presence of 1,1′‐butylenebispyridinium hydrogen sulfate as an efficient, green, and recyclable catalyst produces 7-hydroxy-4-methylcoumarin in good yield under solvent-free conditions at room temperature. This catalyst has advantages such as the following: good to excellent yields, short reaction times, simplicity in operation, and easy workup procedure.
机构:
E China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R ChinaE China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China
Lei, Min
Ma, Lei
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E China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R ChinaE China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China
Ma, Lei
Hu, Lihong
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E China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China
Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R ChinaE China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China