A process for preparing amides by reacting a primary amine and a primary alcohol in the presence of a Ruthenium complex to generate the amide and molecular hydrogen. Primary amines are directly acylated by equimolar amounts of alcohols to produce amides and molecular hydrogen (the only byproduct) in high yields and high turnover numbers. Also disclosed are processes for hydrogenation of amides to alcohols and amines; hydrogenation of organic carbonates to alcohols; hydrogenation of carbamates or urea derivatives to alcohols and amines; amidation of esters; acylation of alcohols using esters; coupling of alcohols with water and a base to form carboxylic acids; dehydrogenation of beta-amino alcohols to form pyrazines and cyclic dipeptides; and dehydrogenation of secondary alcohols to ketones. These reactions are catalyzed by a Ruthenium complex which is based on a dearomatized PNN-type ligand of formula A1 or precursors thereof of formulae A2 or A3.
一种通过在Ruthenium配合物存在下反应一级胺和一级醇以生成酰胺和分子氢的方法。一级胺可直接与等摩尔量的醇酰化,以高收率和高周转数产生酰胺和分子氢(唯一的副产物)。还公开了将酰胺氢化为醇和胺的方法;将有机
碳酸酯氢化为醇的方法;将
氨基甲酸酯或
脲衍
生物氢化为醇和胺的方法;酯的酰胺化;使用酯对醇进行酰化;将醇与
水和碱耦合形成
羧酸;β-
氨基醇的脱氢形成
吡嗪和环二肽;以及二级醇的脱氢形成酮。这些反应由基于公式A1的脱芳香
PNN型
配体或其前体公式A2或A3的Ruthenium配合物催化。