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An efficient synthesis of 4-substituted pyrazolyl-3,4-dihydropyrimidin-2(1H)-(thio)ones catalyzed by Mg(ClO4)2 under ultrasound irradiation

✍ Scribed by Xinli Zhang; Yanping Li; Chenjiang Liu; Jide Wang

Book ID
104057027
Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
164 KB
Volume
253
Category
Article
ISSN
1381-1169

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An environmentally benign aqueous Biginelli protocol for the synthesis of substituted 3,4-dihydropyrimidin-2(1H)-ones using thiamine hydrochloride as a catalyst has been achieved. These ultrasound-assisted reactions proceed efficiently in water in the absence of organic solvent. Utilization of ultra