Cu-promoted reactions of 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123) with dialkylphosphonates produced dialkyl (2,2,2-trifluoroethyl)phosphonates efficiently under mild conditions by successively activating the two inert C–Cl bonds in HCFC-123. These reactions can be efficiently carried out on a >30 g scale with moderate to good yields.
Trifluoroacetaldehyde <i>N</i>-Tosylhydrazone as a Precursor of Trifluorodiazoethane in Reactions of Insertion into the Heteroatom–Hydrogen Bond
作者:Vladimir S. Ostrovskii、Irina P. Beletskaya、Igor D. Titanyuk
DOI:10.1021/acs.orglett.9b03471
日期:2019.11.15
volatility, storage instability, toxicity, and explosiveness. We report the application of trifluoroacetaldehyde N-tosylhydrazone as a CF3CHN2 precursor capable of generating in situ trifluorodiazoethane under mild basic conditions. Copper-catalyzed P–H, O–H, S–H, and C–H insertion reactions of trifluoroacetaldehyde N-tosylhydrazone revealed its wide applicability in the synthesis of trifluoroethyl-containing