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Application of Photoclick Chemistry for the Synthesis of Pyrazoles via 1,3-Dipolar Cycloaddition between Alkynes and Nitrilimines Generated In Situ
作者:Richard Remy、Christian G. Bochet
DOI:10.1002/ejoc.201701225
日期:2018.1.23
The photolysis of tetrazoles leads to the extrusion of dinitrogen and forms a reactive nitrile imine intermediate. The latter can then react in situ with alkynes in a [3+2] cycloaddition providing pyrazoles. Some reactivity trends were identified, such as a preference for electron‐poor alkynes. On the tetrazole part, there is a clear preference for either aromatic or conjugated substituents.
四唑的光解导致二氮的挤出并形成反应性腈亚胺中间体。然后后者可以在[3 + 2]环加成反应中与炔烃原位反应,提供吡唑。确定了一些反应性趋势,例如偏爱电子贫乏的炔烃。在四唑部分,显然优选芳族或共轭取代基。
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作者:Csongar, Christian、Leihkauf, Peter、Lohse, Volkmar、Tomaschewski, Georg
DOI:——
日期:——
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作者:Csongar, Ch.、Leihkauf, P.、Lohse, V.、Tomaschewski, G.
DOI:——
日期:——
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作者:Leihkauf, Peter、Lohse, Volkmar、Csongar, Christian、Siegmund, Manfred、Tomaschewski, Georg
DOI:——
日期:——
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DOI:——
日期:——