by phosphorus. Indolerelated benzophosphole (phosphindole) derivatives are well known, but only scattered information is available on their 3-oxo derivatives,1 which would be related to precursors of indigo or thioindigo. On the way to phosphoindigo, we studied a number of reactions to find suitable reagents and conditions for the oxidative coupling of known 1-ethoxy1-oxophosphindoline-3-one (1)1,2
π-共轭有机
磷化合物和
染料化学中的一个巨大挑战仍然是
磷靛蓝的制备,其中靛蓝的氮原子被
磷取代。与
吲哚相关的苯并
磷(膦
吲哚)衍
生物是众所周知的,但关于其 3-氧代衍
生物的信息只有零星的信息,1 可能与靛蓝或
硫靛蓝的前体有关。在获得
磷酸靛蓝的过程中,我们研究了许多反应,以寻找合适的试剂和条件,以用于氧化偶联已知的 1-ethoxy1-oxophosphindoline-3-one (1)1,2 或新的 phosphindoline-3-one (2) [ phosphoindoxyle] 导致第一个 1,1'-diphosphaindigo 衍
生物。