The present invention relates to novel Ruthenium complexes of formulae A1-A4 and their use, inter alia, for (1) dehydrogenative coupling of alcohols to esters; (2) hydrogenation of esters to alcohols (including hydrogenation of cyclic esters (lactones) or cyclic di-esters (di-lactones), or polyesters); (3) preparing amides from alcohols and amines—(including the preparation of polyamides (e.g., polypeptides) by reacting dialcohols and diamines and/or polymerization of amino alcohols and/or forming cyclic dipeptides from p-aminoalcohols; (4) hydrogenation of amides (including cyclic dipeptides, polypeptides and polyamides) to alcohols and amines; (5) hydrogenation of organic carbonates (including polycarbonates) to alcohols or hydrogenation of carbamates (including polycarbamates) or urea derivatives to alcohols and amines; (6) dehydrogenation of secondary alcohols to ketones; (7) amidation of esters (i.e., synthesis of amides from esters and amines); (8) acylation of alcohols using esters; (9) coupling of alcohols with water and a base to form carboxylic acids; and (10) preparation of amino acids or their salts by coupling of amino alcohols with water and a base. The present, invention further relates to the use of certain known Ruthenium complexes for the preparation of amino acids or their salts from amino alcohols.
本发明涉及新型A1-A4式
钌配合物及其用途,包括(1)醇的脱氢偶联制备酯;(2)酯的加氢制备醇(包括环酯(内酯)或环二酯(二内酯)的加氢,或聚酯的加氢);(3)从醇和胺制备酰胺(包括通过二醇和二胺反应或
氨基醇的聚合形成聚酰胺(例如,
多肽),或从p-
氨基醇形成环二肽);(4)酰胺的加氢(包括环二肽、
多肽和聚酰胺的加氢至醇和胺);(5)有机
碳酸酯(包括聚
碳酸酯)的加氢至醇或羰基酸酯(包括聚羰基酸酯)或
脲衍
生物的加氢至醇和胺;(6)次级醇的脱氢至酮;(7)酯的酰胺化(即通过酯和胺合成酰胺);(8)使用酯对醇进行酰化;(9)醇与
水和碱的偶联形成
羧酸;以及(10)通过
氨基醇与
水和碱的偶联制备
氨基酸或其盐。本发明还涉及使用某些已知的
钌配合物从
氨基醇制备
氨基酸或其盐。