科研之友
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摘要
A new schiff base ytterbium complex was synthesized and used as catalyst for a three-component, one-pot reaction involving 1,3-keto ester with urea or thiourea and aldehyde. The reactions resulted in the formation of two different dihydropyrimidines, the Biginelli type 3,4-dihydropyrimidin-2-(1H)-ones and non-Biginelli type. A new mechanism based on [4 2] cycloaddition was proposed which serves as a reasonable explanation for the two different products.
- 出版日期2009-1-5
- 单位天津大学
