α-fluorination of ketones by xenon and iodobenzene difluorides: A stereochemical evidence demonstrating their mechanistic differences
作者:Tadahiko Tsushima、Kenji Kawada、Teruji Tsuji
DOI:10.1016/s0040-4039(00)87050-1
日期:1982.1
Xenon difluoride reacts smootlhy with various steroid silyl enolethers in the absence of any acid catalyst to afford stereoselectively α-oriented α-fluoroketones in good yields while iodotoluene difluoride reacts rather sluggishly with these silyl enolethers to competitively produce β-oriented α-fluoro ketones, elimination and other nucleophilic substitution products. The observed stereochemical