Influence of 1,3-Difluorobenzene Substituents for Palladium-Catalyzed Direct Arylations
作者:Tao Yan、Charles Beromeo Bheeter、Henri Doucet
DOI:10.1002/ejoc.201301131
日期:2013.11
bromo, methoxy or amino) on 1,3-difluorobenzenes in their palladium-catalysed direct C2 arylation has been explored. With most substituents, the reaction proceeds nicely using air-stable palladium catalysts (0.5–2 mol-%) and KOAc/DMA. In general, very regioselective C2-arylation was observed. Moreover, a variety of substituents on the aryl bromide coupling partner (ester, acetyl, formyl, nitro, nitrile
已经探索了吸电子和给电子取代基(硝基、腈、氯、溴、甲氧基或氨基)对 1,3-二氟苯在钯催化的直接 C2 芳基化反应中的影响。对于大多数取代基,使用空气稳定的钯催化剂 (0.5–2 mol-%) 和 KOAc/DMA 可以很好地进行反应。通常,观察到非常区域选择性的 C2-芳基化。此外,可以容忍芳基溴偶联伙伴上的各种取代基(酯、乙酰基、甲酰基、硝基、腈、三氟甲基、氯、氟或甲基)。