Steering Reaction Pathways: From Benzyl Claisen Rearrangements to Powerful Ionic Shifts
作者:Viviana Valerio、Claire Madelaine、Nuno Maulide
DOI:10.1002/chem.201003591
日期:2011.4.18
Take a walk on the wild side: A novel benzylClaisen cascade rearrangement of keteniminium salts is described. The reaction leads to α‐arylated lactones under metal‐free conditions (top scheme; Tf=trifluoromethanesulfonyl). It is further demonstrated that the cationic intermediates involved can be steered away from pericyclic reaction manifolds into powerful ionic shifts through reaction design (bottom
Borinic Acid Catalysed Reduction of Tertiary Amides with Hydrosilanes: A Mild and Chemoselective Synthesis of Amines
作者:Aurélien Chardon、Tharwat Mohy El Dine、Rémi Legay、Michaël De Paolis、Jacques Rouden、Jérôme Blanchet
DOI:10.1002/chem.201604802
日期:2017.2.10
A reduction of various aryl, alkyl, and α,β‐unsaturated amides with phenylsilane, catalysed by a borinic acid, is reported. The unprecedented reaction was carried out under very mild conditions and led to useful amines. Furthermore, the reaction tolerates a variety of functional groups. Initial investigations implicated that an intermediate diarylhydroborane is involved in the reaction mechanism.