Efficient and chemoselective direct reductive amination of aromatic aldehydes catalyzed by oxo–rhenium complexes containing heterocyclic ligands
作者:Joana R. Bernardo、Sara C.A. Sousa、Pedro R. Florindo、Mariusz Wolff、Barbara Machura、Ana C. Fernandes
DOI:10.1016/j.tet.2013.08.016
日期:2013.10
This work describes the catalytic activity of 17 oxo–rhenium complexescontainingheterocyclicligands in the direct reductive amination of 4-nitrobenzaldehyde with 4-chloroaniline, using phenylsilane as reducing agent. In general, all of the catalysts tested gave excellent yields of the secondary amine, although, the best result was obtained with the catalytic system PhSiH3/ReOBr2(Hhmpbta)(PPh3) (2