1-Aryl-substituted 2,3,3-trifluoro-1-propenyl p-toluenesulfonate 1 was smoothly hydrolyzed in a mixed solvent of dimethyl sulfoxide-water (1 : 1) in the presence of sodium hydroxide at 80 °C to afford the corresponding aryl α-monofluoromethyl ketones 2 in fair to good yields.
Effect of acid catalysis on the direct electrophilic fluorination of ketones, ketals, and enamides using Selectfluor™
作者:Jack Liu、Johann Chan、Craig M. Bryant、Petar A. Duspara、Ernest E. Lee、David Powell、Hua Yang、Ziping Liu、Chris Walpole、Edward Roberts、Robert A. Batey
DOI:10.1016/j.tetlet.2012.03.074
日期:2012.6
The fluorination of ketones, ketals, and enamides has been achieved using the electrophilic fluorinating reagent Selectfluor™ (F-TEDA-BF4). For the reactions of ketones and ketals the use of sulfuric acid (0.1 equiv) as an additive was found to facilitate the reaction leading to more rapid product formation. This behavior is analogous to the known effects of acid catalysis on the bromination of ketones