A process is disclosed in which optically active glycols are produced through an electrolytic asymmetric dihydroxylation (ADH) reaction involving olefins as substrates. The ADH reaction is mediated by a catalytically active amount of osmium tetroxide or osmium-containing precursor in a protic medium in the presence of chiral ligand. Any lower valent osmium species produced in the course of the ADH reaction is regenerated electrolytically either directly in the absence of a secondary oxidant or indirectly in the presence of a secondary oxidant that itself undergoes electrolytic regeneration.
本发明揭示了一种通过电解不对称双羟基化(ADH)反应在含有烯烃底物的情况下生成光学活性
乙二醇的过程。ADH反应在手性
配体的存在下,在质子溶剂介质中介导由
四氧化锇或含
锇前体的催化活性量进行。在ADH反应过程中产生的任何低价
锇物种,要么直接在无次级氧化剂的情况下通过电解再生,要么在次级氧化剂的存在下间接进行电解再生。