Brønsted Acid Catalyzed Amination of 1,3-Dicarbonyl Compounds by Iminoiodanes
作者:Philip Chan、Ciputra Tejo、Hui Yeo
DOI:10.1055/s-0033-1340108
日期:——
A synthetic method to aminate 1,3-dicarbonyl compounds with PhI=NTs using BrOnsted acid catalysis is described herein. The method was shown to be applicable to -keto esters and phosphonates as well as 1,3-diones, providing the corresponding ,-acyl amino acid derivatives in moderate to excellent yields.
A Mild and Efficient Direct α-Amination of β-Dicarbonyl Compounds Using Iodosobenzene and <i>p</i>-Toluenesulfonamide Catalyzed by Perchlorate Zinc Hexahydrate
A direct α-amination of β-dicarbonylcompounds has been achieved by using iodosobenzene (PhIO) as an oxidant and p-toluenesulfonamide (TsNH2) as an aminating reagent in the presence of a catalytic amount of perchlorate zinc hexahydrate. The present amination reaction proceeds quickly at rt (<30 min needed for most tested substrates) to provide the corresponding α-N-tosylamido β-dicarbonyl compounds