期刊
ULTRASONICS SONOCHEMISTRY
卷 18, 期 3, 页码 708-712出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2010.11.012
关键词
Green chemistry; Ultrasound irradiation; Multi-component reactions; Dihydropyrano[2,3-c]pyrazoles; Synthesis
资金
- Foundation of Key Laboratory of Organic Synthesis of Jiangsu Province [KJS0812]
A green and convenient approach to the synthesis of dihydropyrano[2,3-c]pyrazoles via four-component reaction of aromatic aldehydes, hydrazine. ethyl acetoacetate and malononitrile in water under ultrasound irradiation is described. This method provides several advantages such as environmental friendliness, shorter reaction time, excellent yields, and simple workup procedure. (C) 2010 Elsevier B.V. All rights reserved.
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