Oxidative nucleophilic substitution of hydrogen in nitroarenes with phenylacetic acid derivatives
作者:Mieczysław Mąkosza、Krystyna Kamieńska-Trela、Maciej Paszewski、Małgorzata Bechcicka
DOI:10.1016/j.tet.2005.09.053
日期:2005.12
Oxidative nucleophilic substitution of hydrogen (ONSH) in nitroarenes with carbanion of isopropyl phenyl acetate gives various products depending on the conditions and oxidant. The reaction carried out in liquid ammonia and KMnO4 oxidant gives iso-propyl α-hydroxy-α-nitroarylphenylacetates formed via hydroxylation of the initial ONSH products. In some cases additionally dimeric, trimeric and tetrameric
硝基芳烃中氢(ONSH)的氧化亲核取代与乙酸异丙基苯酯的碳负离子结合,产生各种产物,具体取决于条件和氧化剂。将反应在液氨中进行和的KMnO 4氧化剂给出异-丙基经由初始ONSH产物的羟基化形成α羟基α-nitroarylphenylacetates。在某些情况下,还形成了二聚,三聚和四聚产物。在THF和卜4 Ñ +的MnO 4 -或DDQ氧化剂简单ONSH产品是由二甲基过氧化酮,而形成氧化(DMD),得到异-丙基羟芳基苯基乙酸酯。二聚和三聚产物显然是通过在氧化过程中产生的硝基苄基自由基与ONSH产物的硝基苄基碳负离子偶联而形成的。