One-Pot Synthesis of CF<sub>3</sub>-Substituted Pyrazolines/Pyrazoles from Electron-Deficient Alkenes/Alkynes and CF<sub>3</sub>CHN<sub>2</sub>Generated in situ: Optimized Synthesis of Tris(trifluoromethyl)pyrazole
作者:Evgeniy Y. Slobodyanyuk、Olexiy S. Artamonov、Oleg V. Shishkin、Pavel K. Mykhailiuk
DOI:10.1002/ejoc.201301852
日期:2014.4
The [3+2] cycloaddition of CF3CHN2, generated in situ, with electron-deficient alkenes/alkynes affords CF3-substituted pyrazolines/pyrazoles in quantitative yields. The one-pot three-component reaction between CF3CH2NH2·HCl, NaNO2, and the substrate proceeds at room temperature in dichloromethane/water.
原位生成的 CF3CHN2 与缺电子烯烃/炔烃的 [3+2] 环加成以定量产率提供 CF3 取代的吡唑啉/吡唑。CF3CH2NH2·HCl、NaNO2和底物之间的一锅三组分反应在室温下在二氯甲烷/水中进行。