The invention relates to a new class of ruthenium (II) complexes containing as ligands 2-(aminomethyl)pyridines and phosphines, proven to be extremely active catalysts in the reduction of ketones to alcohols via hydrogen transfer. By using 2-propanol as the hydrogen source with the ruthenium complexes, high yields of the corresponding alcohol can be rapidly obtained starting from linear and cyclic alkyl aryl, dialkyl and diaryl ketones. The conversion of ketones to alcohols can reach 100% if operating in a gaseous hydrogen atmosphere (2-3 atm). Where the phosphines used are optically active, starting from prochiral ketone compounds various types of optically active alcohols can be produced, being important intermediates in the pharmaceutical industry, in the agrochemical industry and for fine chemicals generally.
该发明涉及一类新型的
钌(II)络合物,其中
配体为2-(
氨甲基)
吡啶和膦,被证明在通过氢转移将酮还原为醇的过程中具有极高的催化活性。通过使用2-
丙醇作为氢源与
钌络合物,可以从直链和环烷基芳基、二烷基和二芳基酮中迅速获得相应醇的高收率。如果在气态
氢气氛围(2-3大气压)下操作,酮转化为醇的收率可以达到100%。如果使用的膦是光学活性的,从拟手性酮化合物出发,可以生产各种类型的光学活性醇,这些醇是制药工业、农药工业和精细化工等领域的重要中间体。