In Situ Generation of Difluoromethyl Diazomethane for [3+2] Cycloadditions with Alkynes
作者:Pavel K. Mykhailiuk
DOI:10.1002/anie.201501529
日期:2015.5.26
A novel approach to agrochemically important difluoromethyl‐substituted pyrazoles has been developed based on the elusive reagent CF2HCHN2, which was synthesized (generated in situ) for the first time and employed in [3+2] cycloaddition reactions with alkynes. The reaction is extremely practical as it is a one‐pot process, does not require a catalyst or the isolation of the potentially toxic and explosive
Heptafluoroisopropyl diazomethane (i-C<sub>3</sub>F<sub>7</sub>CHN<sub>2</sub>): in situ generation and synthesis of pyrazoles
作者:Pavel K. Mykhailiuk
DOI:10.1039/c7ob01579h
日期:——
A novel chemical reagent – heptafluoroisopropyl diazomethane (i-C3F7CHN2) – has been generated in situ in aqueous media. It readily reacts with electron-deficient alkynes towards polyfluorinated pyrazoles that are important in agrochemistry.
一种新型化学试剂-七氟异丙基重氮甲烷(iC 3 F 7 CHN 2)-在水性介质中原位生成。它容易与电子不足的炔烃反应生成对农业化学很重要的多氟化吡唑。
New Life for Diazoacetonitrile (N<sub>2</sub>CHCN): in situ Generation and Practical Synthesis of CN-Pyrazoles
作者:Pavel K. Mykhailiuk
DOI:10.1002/ejoc.201501027
日期:2015.11
Explosive diazoacetonitrile (N2CHCN) was generated in situ and used in the practical synthesis of agrochemistry-related CN-pyrazoles. In situ generated N2CHCN is much safer than the individual reagent. The developed method is, therefore, expected to make this reagent as useful in chemistry as ethyl diazoacetate (N2CHCO2Et).