Oxidation of Disulfides to Thiolsulfinates with Hydrogen Peroxide and a Cyclic Seleninate Ester Catalyst
作者:Nicole McNeil、Ciara McDonnell、Miranda Hambrook、Thomas Back
DOI:10.3390/molecules200610748
日期:——
of regioisomers. Lipoic acid and N,N′-dibenzoylcystine dimethyl ester were oxidized readily under similar conditions. Although isolated yields of the product thiolsulfinates were generally modest, these experiments demonstrate that the method nevertheless has preparative value because of its mild conditions. The results also confirm the possibility that cyclic seleninate esters could catalyze the further
环状硒酸酯用作抗氧化剂硒酶谷胱甘肽过氧化物酶的模拟物。它们用硫醇催化有害过氧化物的还原,硫醇在此过程中转化为二硫化物。研究了在这些条件下硒酸酯还可以催化二硫化物进一步氧化为硫代亚磺酸盐和其他过度氧化产物的可能性。这对硒酸酯的潜在医学应用产生了影响,因为它可能催化含二硫化物的旁观肽和蛋白质的不需要的氧化。多种芳基和烷基二硫化物在催化苯并-1,2-氧杂硒代硒氧化物存在下用过氧化氢进行轻松氧化,得到相应的硫代亚磺酸盐作为主要产物。不对称的二硫化物通常提供区域异构体的混合物。硫辛酸和 N,N'-二苯甲酰胱氨酸二甲酯在类似条件下很容易被氧化。尽管产物硫代亚磺酸盐的分离产率一般不大,但这些实验表明该方法仍然具有制备价值,因为它的条件温和。结果还证实了环状硒酸酯可以催化体内二硫化物进一步不希望的氧化的可能性。