Dehydrogenation of Perfluoroalkyl Ketones by Using a Recyclable Oxoammonium Salt
作者:Trevor A. Hamlin、Christopher B. Kelly、Nicholas E. Leadbeater
DOI:10.1002/ejoc.201300392
日期:2013.6
A novel dehydrogenation reaction of perfluoroalkyl ketones by the oxoammonium salt 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (4-NHAc-TEMPO+BF4–, Bobbitt's salt, 1) is described. The reaction proceeds under mildly basic conditions and appears to be unique to perfluoroalkyl ketones. A proposed mechanism for this unusual transformation is given. The byproduct of the reaction
描述了全氟烷基酮通过氧代铵盐 4-乙酰氨基-2,2,6,6-四甲基哌啶-1-四氟硼酸氧代铵(4-NHAc-TEMPO+BF4–,博比特盐,1)进行的新型脱氢反应。该反应在弱碱性条件下进行,似乎是全氟烷基酮所独有的。给出了这种不寻常转换的建议机制。反应的副产物 4-乙酰氨基-2,2,6,6-四甲基-1-哌啶基氧基 (1a) 可以很容易地回收并用于再生氧铵盐。