Synthesis of Tetrasubstituted Pyrazoles from Substituted Hydrazines and β-Keto Esters
作者:Ian J. Bakanas、Gustavo Moura-Letts
DOI:10.1002/ejoc.201601093
日期:2016.11
Herein we report the synthesis of tetrasubstituted pyrazoles from simple hydrazines and β-keto esters under mild, basic conditions. This reaction enables the selective synthesis of pyrazolones, alkoxypyrazoles, and tetrasubstituted pyrazoles for a large variety of aromatic hydrazines and substituted β-keto esters with high yields and selectivities. This method permits access to highly complex pyrazole
在此,我们报告了在温和、碱性条件下从简单的肼和 β-酮酯合成四取代的吡唑。该反应能够选择性合成吡唑啉酮、烷氧基吡唑和四取代吡唑,以高产率和选择性地合成多种芳香肼和取代 β-酮酯。这种方法允许使用具有四个正交多样化组的高度复杂的吡唑支架。