A catalyst‐ and additive‐free chemoselective transfer hydrogenation of α‐keto amides to α‐hydroxy amides is easily achieved by using sodium formate as a hydrogen source. Control experiments suggest that the NH group of α‐keto amides is crucial for the chemoselective reduction through the formation of hydrogen bonds.
Zirconium-MOF-catalysed selective synthesis of α-hydroxyamide <i>via</i> the transfer hydrogenation of α-ketoamide
作者:Ashish A. Mishra、Bhalchandra M. Bhanage
DOI:10.1039/c9nj00900k
日期:——
This work reports the synthesis of α-hydroxy amide and its derivatives using zirconium-based metal–organic frameworks (Zr-MOFs). The Zr-MOF was prepared using a ligand containing different functionalities as a linker with different porosities. The catalyst efficiently facilitated the transferhydrogenation of α-ketoamide to α-hydroxyamide. The reaction involved a green hydrogen source, namely isopropyl
An efficient and practical method for chemoselective “on-water” reduction of α-keto amide by Hantzschester without using any catalysts and additives was developed. Control experiments indicated that the intramolecular hydrogen bond of α-keto amide was crucial for this transformation. A variety of α-hydroxy amides were prepared in high yields in an environmentally friendly way.