A method for the oxidation of organotrifluoroborates using Oxone was developed. A variety of aryl-, heteroaryl-, alkenyl-, and alkyltrifluoroborates were converted into the corresponding oxidized products in excellent yields. This method proved to be tolerant of a broad range of functional groups, and in secondary alkyl substrates it was demonstrated to be completely stereospecific.
Stereospecific Cross-Coupling of Secondary Alkyl β-Trifluoroboratoamides
作者:Deidre L. Sandrock、Ludivine Jean-Gérard、Cheng-yi Chen、Spencer D. Dreher、Gary A. Molander
DOI:10.1021/ja108949w
日期:2010.12.8
The stereospecific cross-coupling of enantioenriched nonbenzylic secondary alkyl boron compounds has been achieved. The high selectivity toward product formation over an undesired beta-H elimination pathway is achieved via an intramolecular coordination of an ancillary carbonyl to the metal center in the diorganopalladium intermediate.