A practical method for the removal of a versatile acidicamide auxiliary has been developed. Facile alcoholysis of the amide in the presence of KOAc is enabled by an epoxide, which mechanistically resembles the removal of the Myers’ auxiliary. The protocol has been applied to the removal of a variety of amide substrates and their C–H functionalization products with high efficiency and low cost, representing
Pd(II)-Catalyzed Carbonylation of C(sp<sup>3</sup>)−H Bonds: A New Entry to 1,4-Dicarbonyl Compounds
作者:Eun Jeong Yoo、Masayuki Wasa、Jin-Quan Yu
DOI:10.1021/ja108754f
日期:2010.12.15
Pd(II)-catalyzed beta-C(sp(3))-H carbonylation of N-arylamides under CO (1 atm) has been achieved. Following amide-directed C(sp(3))-H cleavage and insertion of CO into the resulting [Pd(II)-C(sp(3))] bond, intramolecular C-N reductive elimination gave the corresponding succinimides, which could be readily converted to 1,4-dicarbonyl compounds. This method was found to be effective with substrates containing alpha-hydrogen atoms and could be applied to effect methylene C(sp(3))-H carbonylation of cyclopropanes.