Boronic acid–DMAPO cooperative catalysis for dehydrative condensation between carboxylic acids and amines
作者:Kazuaki Ishihara、Yanhui Lu
DOI:10.1039/c5sc03761a
日期:——
Arylboronic acid and 4-(N,N-dimethylamino)pyridine N-oxide (DMAPO) cooperatively catalyse the dehydrative condensation reaction between carboxylic acids and amines to give the corresponding amides under azeotropic reflux conditions. The cooperative use of...
The <i>ortho</i>-substituent on 2,4-bis(trifluoromethyl)phenylboronic acid catalyzed dehydrative condensation between carboxylic acids and amines
作者:Ke Wang、Yanhui Lu、Kazuaki Ishihara
DOI:10.1039/c8cc02558d
日期:——
2,4-Bis(trifluoromethyl)phenylboronic acid is a highly effective catalyst for dehydrative amidation between carboxylic acids and amines. Mechanistic studies suggest that a 2 : 2 mixed anhydride is expected to be the only active species, and the ortho-substituent of boronic acid plays a key role in preventing the coordination of amines to the boron atom of the active species, thus accelerating the amidation