Wang Huiyana
2013
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Journal
Chinese Journal of Applied Chemistry
Abstract
A series of 4-hydroxy-3-(2-imino ethyl)-2H-chromen-2-ones was first synthesized by the reaction of 4-hydroxy-3-acetyl coumarin and amines in alcohol with 4-methylbenzenesulfonic acid as catalyst under ultrasonic irradiation.The yields were in the range of 62%~94%.The structures of the products were confirmed by IR,1H NMR and HRMS.The structure of compound 3c was determined by X-ray single-crystal diffractions.The advantages of this method are high yield,shorter reaction time,mild condition and simple work-up procedures.