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 amide synthesis from alcohols 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
为在无碱条件下从醇和胺合成酰胺而开发了易于合成的,定义明确的基于N-杂环卡宾的氢化钌(II)配合物。合成了各种酰胺,收率相当理想。在仲胺的情况下,直接脱氢酰胺化是不可行的,需要催化量的碱来促进酯的氨基转移,所述酯是醇二聚的副产物。