Palladium Catalysis Enables Benzylation of α,α‐Difluoroketone Enolates
作者:Ming‐Hsiu Yang、Jordan R. Hunt、Niusha Sharifi、Ryan A. Altman
DOI:10.1002/anie.201604149
日期:2016.7.25
A palladium‐catalyzed decarboxylative benzylation reaction of α,α‐difluoroketone enolates is reported, in which the key C(α)−C(sp3) bond is generated by reductive elimination from a palladium intermediate. The transformation provides convergent access to α‐benzyl‐α,α‐difluoroketone‐based products, and should be useful for accessing biological probes.
Mechanochemical electrophilic fluorination of liquid beta-ketoesters
作者:Joseph L. Howard、Yerbol Sagatov、Duncan L. Browne
DOI:10.1016/j.tet.2017.11.066
日期:2018.6
An improved substrate scope for the mechanochemical electrophilicfluorination of dicarbonyls is reported. The applicable substrates have now been broadened to include liquid β-ketoesters. Key to this capability is the inclusion of a grinding auxiliary (NaCl) to improve mass transfer and prevent pasting or gumming of the reaction mixture. Notably, the use of a small amount of acetonitrile is critical