Direct nucleophilic difluoromethylation of enolizable ketones with CHF2TMS/HMPA
作者:Oleg M. Michurin、Dmytro S. Radchenko、Igor V. Komarov
DOI:10.1016/j.tet.2016.01.032
日期:2016.3
reagent Me3SiCF2H enables multigram synthesis of difluoromethyl alcohols in good yields under mild conditions from a number of aldehydes and ketones in the presence of HMPA. This additive makes possible the previously challenging nucleophilic difluoromethylation of enolizable ketones. DMPU can be used as a non-toxic alternative to the HMPA in the difluoromethylation reaction, albeit the yields were slightly