This paper is dedicated to Professor Youyou Tu, the 2015 Nobel Prize Laureate of Physiology or Medicine, on the occasion of her 90th birthday
Abstract
A practical sodium tert -butoxide (NaOt Bu)-mediated protocol is disclosed for the transamidation of various N ,N -dimethyl amides with primary amines to afford the corresponding amides in moderate to good yields at room temperature under solvent-free conditions. This protocol features a facile work-up procedure and good functional group compatibility, especially for N ,N -dimethyl amides with long-chain alkyl groups and heteroatom-containing amines. Notably, a few representative gram-scale reactions proceed smoothly to furnish the desired amides in high yields, which demonstrates the potential of this process for further practical applications. Several control experiments are carried out and a plausible mechanism is provided.
Key words NaO
t Bu - transamidation -
N ,
N -dimethyl amides - primary amines - solvent-free - gram-scale