Bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms. Compositions for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and one or more bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms. A method for oxidative dyeing of keratin fibers, comprising applying such compositions in the presence of an oxidizing agent, for a period sufficient to develop the desired coloration.
具有环节氮并包含
硫或氧杂原子的双环5-5杂芳香化合物。用于角蛋白纤维氧化染色的组合物,包括适用于染色的介质和一个或多个具有环节氮并包含
硫或氧杂原子的双环5-5杂芳香化合物。一种角蛋白纤维氧化染色的方法,包括在氧化剂存在下应用这种组合物,以便在足够的时间内形成所需的颜色。