In this Letter we report a rapid and facile access to C2-substituted imidazo[4,5-b]pyridine analogues utilizing palladium mediated Buchwald–Hartwig cross-coupling reactions. The use of enolizable heterocycles as cross-coupling partners resulted in a wide range of imidazo[4,5-b]pyridine analogues which are prone to have medicinal relevance. Xantphos and Pd(OAc)2 were found to be more effective for the
                                    在这封信中,我们报告了利用
钯介导的布赫瓦尔德-哈特维格交叉偶联反应快速而轻松地获得C2取代的
咪唑并[4,5- b ]
吡啶类似物的方法。使用可烯醇化的杂环作为交叉偶联伴侣会导致产生广泛的具有医学相关性的
咪唑并[4,5- b ]
吡啶类似物。发现
Xantphos和Pd(OAc)2对于2-卤代
咪唑并[4,5- b ]
吡啶与
吡啶酮亲核试剂的偶联更有效。还报道了区域选择性的合成2-取代的3 H-
咪唑并[4,5- b ]
吡啶和1 H-
咪唑并[4,5- b ]
吡啶的方法。