A Weinreb amide approach to the synthesis of trifluoromethylketones
作者:DiAndra M. Rudzinski、Christopher B. Kelly、Nicholas E. Leadbeater
DOI:10.1039/c2cc35037h
日期:——
A novel route to access trifluoromethylketones (TFMKs) from Weinreb amides is reported. This represents the first documented case of the Ruppert–Prakash reagent (TMS–CF3) reacting in a constructive manner with an amide and enables synthesis of TMFKs without risk of over-trifluoromethylation.
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 oxoammoniumsalt 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