Synthesis of Substituted Pyrazoles via Tandem Cross-Coupling/Electrocyclization of Enol Triflates and Diazoacetates
作者:David J. Babinski、Hector R. Aguilar、Raymond Still、Doug E. Frantz
DOI:10.1021/jo201042c
日期:2011.8.5
The synthesis of 3,4,5-trisubstituted pyrazoles via a tandem catalytic cross-coupling/electrocyclization of enol triflates and diazoacetates is presented. The initial scope of this methodology is demonstrated on a range of differentially substituted acyclic and cyclic enol triflates as well as an elaborated set of diazoacetates to provide the corresponding pyrazoles with a high degree of structural
介绍了通过烯醇三氟甲磺酸酯和重氮乙酸酯的串联催化交叉偶联/电环化合成 3,4,5-三取代的吡唑。该方法的初始范围在一系列差异取代的无环和环状烯醇三氟甲磺酸酯以及一组精心设计的重氮乙酸酯上得到证明,以提供具有高度结构复杂性的相应吡唑。