Most secondary alcohols and β,γ-unsaturated primary alcohols have been catalytically oxidized with N-chloro-4-chlorobenzenesulfonamide sodium salt to the corresponding carbonyl compounds by the addition of a 0.01—0.03 molar amount of dimethyl 2,2′-diselenodibenzoate in good-to-excellent yields, and a catalytic species, methyl 2-[N-(4-chlorophenylsulfonyl)aminoseleno]benzoate (8), was isolated from the reaction mixture. The catalytic oxidation cycle for this reaction is proposed; the decomposition of esters, which are produced by the reaction of alcohols with oxidized 8, was found to be the rate-determining step.
大多数仲醇和β,γ-不饱和伯醇在N-
氯-4-
氯苯磺酰胺钠盐催化下,通过加入0.01-0.03摩尔量的二甲基2,2′-二
硒双
苯甲酸酯,以优良至极佳的产率氧化为相应的羰基化合物,并从反应混合物中分离出一种催化物种——甲基2-[N-(4-
氯苯磺酰基)
氨基
硒]
苯甲酸酯(8)。为该反应提出了催化氧化循环机制,发现醇与氧化态8反应生成的酯的分解步骤为决定反应速率的步骤。