Labor für Elektrooptik am Institut für Hochfrequenztechnik, Technische Universität Braunschweig, Postfach 3329, 38023 Braunschweig, Germany.
Org Lett. 2012 Oct 5;14(19):5090-3. doi: 10.1021/ol302348v. Epub 2012 Sep 19.
In an attempt to synthesize a novel homoleptic complex 3 from 2-methyl-3-phenylquinoxaline 1 and Ir(acac)(3) for application as a triplet emitter in OLEDs (organic light-emitting diodes) no cyclometalation was observed. Instead, an annulation to 1-methyl-4-phenylpyrrolo[1,2-a]quinoxaline 2 was observed. Since pyrroloquinoxalines are potentially bioactive and few paths for their synthesis are known, selected reactions and conditions were investigated, suggesting Ir(acac)(3) as catalyst and proving glycerol to be a reactant.
为了合成新型的均配配合物 3，我们尝试用 2-甲基-3-苯基喹喔啉 1 和 Ir(acac)(3)作为三重态发射体应用于 OLED（有机发光二极管）中，但没有观察到环金属化反应。相反，我们观察到了 1-甲基-4-苯基吡咯并[1,2-a]喹喔啉 2 的环化反应。由于吡咯并喹喔啉具有潜在的生物活性，并且已知的合成途径很少，因此我们研究了一些选定的反应和条件，结果表明 Ir(acac)(3)是催化剂，并且甘油是反应物。
