Efficient synthesis of imidazopyridodiazepines from peri annulation in imidazo[1,2-a]pyridine
摘要:
In 3-amino imidazopyridines, complete C(5) regiospecificity yielded corresponding TIBO-like derivatives (+/-)-3a, 6a and (+/-)-8a-c. The structures of these polycyclic compounds containing the azaindole moiety were determined by 1D and 2D NMR, and by X-ray crystallography. (C) 2002 Elsevier Science Ltd. All rights reserved.
已经开发了功能化2-氯-3-硝基咪唑并[1,2- a ]吡啶的替代策略。Suzuki-Miyaura交叉偶联反应可轻松提供相应的2-芳基化化合物,并由此将硝基还原为胺,从而在3位提供酰胺,苯胺和脲。据报道,使用金属催化的反应使关键化合物胺化。这项研究强调了硝基基团促进氯置换的重要性。其他亲核芳族取代为从咪唑并[1,2- a ]吡啶衍生的各种产物开辟了一条途径。