Palladium-Catalyzed Cross-Coupling Reactions of Pyridylboronic Acids with Heteroaryl Halides Bearing a Primary Amine Group: Synthesis of Highly Substituted Bipyridines and Pyrazinopyridines
作者:Amy E. Thompson、Gregory Hughes、Andrei S. Batsanov、Martin R. Bryce、Paul R. Parry、Brian Tarbit
DOI:10.1021/jo0402226
日期:2005.1.1
A range of halogenated aromatics and heteroaromatics bearing a primary amine group are shown to be suitable substrates for Suzuki cross-coupling reactions with arylboronic acids and pyridylboronic acids under standard conditions, without the need for protection/deprotection steps. New amino-substituted arylpyridines, bipyridines, and pyrazinopyridines have thereby been obtained. Conditions for the
已表明,在标准条件下,无需保护/脱保护步骤,一系列带有伯胺基团的卤代芳族化合物和杂芳族化合物是适用于Suzuki与芳基硼酸和吡啶基硼酸交叉偶联反应的底物。从而获得了新的氨基取代的芳基吡啶,联吡啶和吡嗪并吡啶。在大约1小时内有效合成2-甲氧基-5-吡啶基硼酸1和2-甲氧基-3-吡啶基硼酸2的条件。定义了75 g批次。2-氨基-5-溴吡嗪与2,5-二甲氧基-1,4-苯二硼酸的2倍反应得到1,4-二甲氧基-2,5-双[2-(5-氨基吡唑基)]苯31。1和31的X射线晶体结构·报告了DMF。