Palladium-Catalyzed Direct Oxidation of Alkenes with Molecular Oxygen: General and Practical Methods for the Preparation of 1,2-Diols, Aldehydes, and Ketones
作者:Azhong Wang、Huanfeng Jiang
DOI:10.1021/jo100125q
日期:2010.4.2
1,2-Diols, aldehydes, and ketones are important intermediates in chemical synthesis, and alkenes are possible precursors for 1,2-diols, aldehydes, and ketones. Herein, novel and environmentally benign methods for palladium-catalyzed dihydroxylation and oxidative cleavage of olefins with oxygen as sole oxidant are presented. The cleavage reactions were performed with acid as additive in aqueous solution
1,2-二醇,醛和酮是化学合成中的重要中间体,烯烃是1,2-二醇,醛和酮的可能前体。在此,提出了新颖的且环境友好的方法,该方法用于钯催化的二羟基化作用以及用氧作为唯一氧化剂的烯烃的氧化裂解。裂解反应是用酸作为添加剂在水溶液中进行的,而1,2-二醇是在碱的存在下形成的。已经证明广泛的底物范围允许单取代的芳族和脂族末端烯烃,1,2-二取代的和1,1-二取代的烯烃。二氧-Pd II配合物的裂解反应意味着1,2-二醇可能是烯烃裂解的关键中间体。