The Synthesis of Benzimidazoles and Quinoxalines from Aromatic Diamines and Alcohols by Iridium-Catalyzed Acceptorless Dehydrogenative Alkylation
作者:Toni Hille、Torsten Irrgang、Rhett Kempe
DOI:10.1002/chem.201400400
日期:2014.5.5
N‐heteroaromatics with many applications in pharmaceutical and chemical industry. Here, the synthesis of both classes of compounds starting from aromatic diamines and alcohols (benzimidazoles) or diols (quinoxalines) is reported. The reactions proceed through acceptorless dehydrogenative condensation steps. Water and two equivalents of hydrogen are liberated in the course of the reactions. An Ir complex stabilized
苯并咪唑和喹喔啉是重要的N-杂芳族化合物,在制药和化学工业中有许多应用。在此,报道了从芳族二胺和醇(苯并咪唑)或二醇(喹喔啉)开始的两类化合物的合成。反应通过无受体的脱氢缩合步骤进行。在反应过程中释放出水和两当量的氢。由三齿P ^ N ^ P配体N 2,N 6-双(二异丙基膦基)吡啶-2,6-二胺稳定的Ir配合物显示出两个反应的最高催化活性。