Dichotomy of Atom-Economical Hydrogen-Free Reductive Amidation vs Exhaustive Reductive Amination
作者:Pavel N. Kolesnikov、Dmitry L. Usanov、Karim M. Muratov、Denis Chusov
DOI:10.1021/acs.orglett.7b02821
日期:2017.10.20
Rh-catalyzed one-step reductive amidation of aldehydes has been developed. The protocol does not require an external hydrogen source and employs carbon monoxide as a deoxygenative agent. The direction of the reaction can be altered simply by changing the solvent: reaction in THF leads to amides, whereas methanol favors formation of tertiaryamines.
The first example of base‐metal‐catalysed synthesis of amides from the coupling of primary amines with either alcohols or esters is reported. The reactions are catalysed by a new manganese pincercomplex and generate hydrogen gas as the sole byproduct, thus making the overall process atom‐economical and sustainable.