Ru配合物催化伯胺与内部炔烃的氧化偶联是一种通用的原子经济学方法,在N杂环的合成中具有广泛的应用范围。反应通过微波辐射在15分钟内或在常规加热条件下的24小时内通过区域选择性CH键活化而进行。2,3,5-取代的吡啶,苯并[ h ]异喹啉,苯并[ g ]异喹啉,8,9-二氢-苯并[ de ]喹啉,5,6,7,8-四氢异喹啉,吡啶基[3, 4克]异喹啉和吡啶[4,3克取决于所用的起始伯胺,可以达到]异喹啉。在苄胺底物上的DFT计算支持了一种反应机理,该机理包括乙酸盐辅助的CH键活化,迁移插入和CN键形成步骤,涉及28–30 kcal mol -1。计算研究扩展到其他底物,即1-萘甲基,2-甲基烯丙基和2-噻吩甲胺。
Primary Amines as Directing Groups in the Ru-Catalyzed Synthesis of Isoquinolines, Benzoisoquinolines, and Thienopyridines
作者:Pedro Villuendas、Esteban P. Urriolabeitia
DOI:10.1021/jo400344m
日期:2013.6.7
Isoquinolines, benzoisoquinolines, thieno[3,2-c]pyridines and fused heteroaryl[2,3-c] pyridines, with a wide variety of substituents at different positions of the aromatic or heteroaromatic rings, have been synthesized by Ru-catalyzed oxidative coupling of a broad range of benzylamines or heterocycles with internal alkynes. All benzylamines and heterocycles have unprotected primary amines as efficient directing groups.