Synthesis of Cyclic Imides from Nitriles and Diols Using Hydrogen Transfer as a Substrate-Activating Strategy
作者:Jaewoon Kim、Soon Hyeok Hong
DOI:10.1021/ol501835t
日期:2014.9.5
method for the synthesis of cyclicimidesfrom nitriles and diols was developed. The method utilizes a Ru-catalyzed transfer-hydrogenation reaction in which the substrates, diols, and nitriles are simultaneously activated into lactones and amines in a redox-neutral manner to afford the corresponding cyclicimides with evolution of H2 gas as the sole byproduct. This operationally simple and catalytic
Ruthenium-Catalyzed Redox-Neutral and Single-Step Amide Synthesis from Alcohol and Nitrile with Complete Atom Economy
作者:Byungjoon Kang、Zhenqian Fu、Soon Hyeok Hong
DOI:10.1021/ja404695t
日期:2013.8.14
A completely atom-economical and redox-neutral catalytic amide synthesis from an alcohol and a nitrite is realized. The amide C-N bond is efficiently formed between the nitrogen atom of nitrile and the alpha-carbon of alcohol, with the help of an N-heterocyclic carbene-based ruthenium catalyst, without a single by-product. A utility of the reaction was demonstrated by synthesizing C-13 or N-15 isotope-labeled amides without involvement of any separate reduction and oxidation step.
N-Heterocyclic carbene-based well-defined ruthenium hydride complexes for direct amide synthesis from alcohols and amines under base-free conditions
作者:Kunsoon Kim、Byungjoon Kang、Soon Hyeok Hong
DOI:10.1016/j.tet.2015.02.016
日期:2015.7
carbene-based ruthenium(II) hydride complexes were developed for amidesynthesisfromalcohols and amines under base-free conditions. Diverse amides were synthesized in fair-to-excellent yields. In the case of secondary amines, where direct dehydrogenative amidation is not feasible, a catalytic amount of a base was required to promote the transamidation of esters, which are byproducts of alcohol dimerization