NO-Mediated Aromatic Nitration during Decomposition of Phenolic S-Nitrosothiols in Non-Aqueous Aerobic Medium.
作者:Catherine PETIT、Vania BERNARDES-GENISSON、Pascal HOFFMANN、Jean-Pierre SOUCHARD、Serge LABIDALLE
DOI:10.1248/cpb.48.1634
日期:——
Five novel S-nitrosothiol compounds (6-10) derived from L-cysteine were generated in solution and their decomposition rate was followed by UV spectroscopy. In acetonitrile, compounds 9 and 10 were the most stable of this series with a half-life of 24 h. The final organic decomposition products of the five S-nitrosothiols were also analysed. Derivatives 8, 9, and 10, possessing a phenolic hydroxyl group, afforded an unexpected decomposition pathway, with nitration of aromatic ring occurring in non-aqueous media. A mechanism involving a phenoxy radical seems to be implicated.
在溶液中生成了源自 L-半胱氨酸的五种新型 S-亚硝硫醇化合物(6-10),并通过紫外光谱法跟踪了它们的分解速率。在乙腈中,化合物 9 和 10 是该系列中最稳定的,半衰期为 24 小时。具有酚羟基的衍生物 8、9 和 10 提供了一种意想不到的分解途径,在非水介质中发生了芳香环的硝化反应。这似乎与苯氧基自由基有关。