作者:Júlia Comas‐Barceló、Robert S. Foster、Béla Fiser、Enrique Gomez‐Bengoa、Joseph P. A. Harrity
DOI:10.1002/chem.201406118
日期:2015.2.16
reaction of sydnones and terminal alkynes, providing significant reduction in reaction times. Specifically, the use of Cu(OTf)2 is found to provide 1,3‐disubstituted pyrazoles, whereas simply switching the promoter system to Cu(OAc)2 allows the corresponding 1,4‐isomers to be produced. The mechanism of the Cu‐effect in each case has been investigated by experimental and theoretical studies, and they
已发现铜盐可促进sydnones和末端炔烃的环加成反应,从而显着缩短反应时间。具体而言,发现使用Cu(OTf)2可以提供1,3-二取代的吡唑,而简单地将启动子系统转换为Cu(OAc)2则可以生产相应的1,4-异构体。通过实验和理论研究已经研究了每种情况下Cu的作用机理,他们认为Cu(OTf)2通过路易斯酸活化了sydnone起作用,而Cu(OAc)2促进了反应性Cu I乙酰化物的形成。。