9-azanoradamantane N—oxyl compound and method for producing same, and organic oxidation catalyst and method for oxidizing alcohols using 9-azanoradamantane N—oxyl compound
9-azanoradamantane N—oxyl compound and method for producing same, and organic oxidation catalyst and method for oxidizing alcohols using 9-azanoradamantane N—oxyl compound
9-azanoradamantane N—oxyl compound and method for producing same, and organic oxidation catalyst and method for oxidizing alcohols using 9-azanoradamantane N—oxyl compound
申请人:TOHOKU UNIVERSITY
公开号:US09114390B2
公开(公告)日:2015-08-25
An organocatalyst for oxidizing alcohols in which a primary alcohol is selectively oxidized in a polyol substrate having a plurality of alcohols under environmentally-friendly conditions. The organic oxidation catalyst has an oxygen atom bonded to a nitrogen atom of an azanoradamantane skeleton and at least one alkyl group at positions 1 and 5. The oxidation catalyst has higher activity than TEMPO, which is an existing oxidation catalyst, in the selective oxidation reaction of primary alcohols, and better selectivity than AZADO and 1-Me-AZADO. This DMN-AZADO can be applied to the selective oxidation reaction of primary alcohols that contributes to shortening the synthesizing process for pharmaceuticals, pharmaceutical raw materials, agricultural chemicals, cosmetics, organic materials, and other such high value-added organic compounds.
effects of ethylene glycol-derived alcohols/hemiacetals on inhibiting oxidation catalysts. Herein, using a CuCl/tetramethylethylenediamine/1,5-dimethyl-9-azanoradamantane N-oxyl catalyst, we describe a highlyefficient aerobic oxidative esterification reaction of ethylene glycol to various oxalic acid diesters via selective oxidation of ethylene glycol-derived alcohols/hemiacetals even in the presence
理想的绿色酯化反应之一是需氧氧化酯化反应,该反应仅使用化学计量的不同醇,通过分子间选择性醇氧化,然后通过将其他醇和半缩醛氧化加入酯形成半缩醛。然而,迄今为止尚未报道通过氧化酯化合成草酸二酯,这可能是由于分子间醇氧化的选择性控制困难以及乙二醇衍生的醇/半缩醛对抑制氧化催化剂的螯合作用。在此,使用 CuCl/四甲基乙二胺/1,5-二甲基-9-氮杂金刚烷N-oxyl 催化剂,我们描述了即使在其他脂肪族伯醇存在下,通过乙二醇衍生的醇/半缩醛的选择性氧化,乙二醇对各种草酸二酯的高效好氧氧化酯化反应。值得注意的是,使用乙二醇和伯/仲醇的理想化学计量比,绿色反应效果很好。彻底的实验研究和理论计算表明,高选择性的氧化酯化是通过乙二醇衍生的醇/半缩醛与 Cu( II ) 物种的优先双齿配位实现的,然后是有效的双电子/单质子转移。