A palladium catalyzed reductive aminocarbonylation of benzylic ammonium triflates with nitroarenes for the synthesis of phenylacetamides was developed. Using Pd(acac)2/DPPF catalystsystem, a range of different substituted phenylacetamides were prepared in moderate to good yields from benzylic ammonium triflates and nitroarenes through Csp3−N bond cleavage. A variety of alkyl, aryl, and halide substituents
Direct Csp<sup>3</sup>–H methylenation of 2-arylacetamides using DMF/Me<sub>2</sub>NH-BH<sub>3</sub> as the methylene source
作者:Yuting Liu、Chang-Ling Wang、Hui-Min Xia、Zhijuan Wang、Yi-Feng Wang
DOI:10.1039/c9ob00875f
日期:——
A direct Csp3–H methylenation of 2-arylacetamides using DMF/Me2NH-BH3 as the methylene source was developed. The formyl group of DMF delivered the carbon and one hydrogen atoms, and the Me2NH-BH3 donated the remaining one hydrogen atom. This protocol offers a new alternative to make useful 2-arylacrylamides from simple starting materials.
An efficient sodium bicarbonate promoted aerobicoxidation reaction to prepare N-monosubstituted α-ketoamides in the presence of n-tetrabutylammonium hydrogensulfate (TBAHS) was described. This reaction provides a very simple and convenient synthetic route to N-monosubstituted α-ketoamides from easily available aryl- or heteroarylacetamides in good to high yields without using toxic reagents and
and recyclable coupling reagent NDTP, which could activate the carboxylic acids via acyl thiocyanide and enable the rapid amide and peptidesynthesis at very mild conditions. In addition, the methodology was compatible with Fmoc-SPPS, which may provide an alternative to peptide manufacturing.