Palladium-Catalyzed Divergent Arylation with Triazolopyridines: One-Pot Synthesis of 6-Aryl-2-α-styrylpyridines
作者:Youngtaek Moon、Soonhyung Kwon、Dahye Kang、Honggu Im、Sungwoo Hong
DOI:10.1002/adsc.201500967
日期:2016.3.17
We have developed a new strategy for palladium‐catalyzed arylation reactions with triazolopyridines, wherein two different chemical transformations (C‐3 vs. C‐7) are observed by differentiating the substrates using different bases. The reactive palladium carbenoids were directly generated from triazolopyridines and underwent denitrogenative arylations with aryl bromides. Intriguingly, when potassium
我们已经开发了一种新的策略用于三唑并吡啶进行的钯催化的芳基化反应,其中通过使用不同的碱区分底物,观察到两种不同的化学转化(C-3与C-7)。反应性钯类胡萝卜素直接由三唑并吡啶产生,并用芳基溴化物进行脱氮芳基化。有趣的是,当碳酸钾用氢替换叔丁醇,直接Ç ħ芳基化发生在酸性最强的位置(C-7)。此外,以一锅法成功地进行了两次不同的催化芳基化反应,为获得6-芳基-2-α-苯乙烯基吡啶提供了便利。