Palladium‐Catalyzed
<i>ortho</i>
‐Benzoylation of Sulfonamides through C−H Activation: Expedient Synthesis of Cyclic
<i>N</i>
‐Sulfonyl Ketimines
作者:Subhadra Ojha、Niranjan Panda
DOI:10.1002/adsc.201900989
日期:2020.2.6
The ortho‐carbonylation of sulfonylarenes by non‐hazardous aryl aldehydes as a carbonyl precursor was reported. In this method, the sulfonamide group serves as a directing group for C−H activation in the presence of a Pd catalyst under ligand‐free conditions. The scope of this strategy has been extended to the one‐pot two‐step synthesis of cyclic N‐sulfonyl ketimines under mild reaction conditions