|
|
Synthesis of Dihydropyrimidin 2(1H) ones by Aqueous Biginelli Reaction under Ultrasonic Irradiation |
WANG Ying, JIAO Rui |
Department of Chemistry, Lianyungang Teachers College, Lianyungang 222006, China |
|
|
Abstract Eleven 3,4-dihydropyrimidin-2(1H) ones were efficiently synthesized by aqueous Biginelli reaction of β-ketoester, aldehyde and urea(or thiourea) catalyzed by NaHSO4 under ultrasonic irradiation with the yields of 80%~93%. The structures were confirmed by 1H NMR and HR-MS.
|
Received: 30 June 2015
|
|
|
|
|
|
|