Assembly of <i>N</i>,<i>N</i>-Disubstituted Hydrazines and 1-Aryl-1<i>H</i>-indazoles via Copper-Catalyzed Coupling Reactions
作者:Xiaodong Xiong、Yongwen Jiang、Dawei Ma
DOI:10.1021/ol300847v
日期:2012.5.18
CuI-catalyzed coupling of N-acyl-N′-substituted hydrazines with aryl iodides takes place at 60–90 °C to afford N-acyl-N′,N′-disubstituted hydrazines regioselectively and thereby gives a facile method for assembling N,N-diaryl hydrazines. N-Acyl-N′-substituted hydrazines can also react with 2-bromoarylcarbonylic compounds at 60–125 °C under the catalysis of CuI/4-hydroxy-l-proline to provide 1-aryl-1H-indazoles
N-酰基-N'-取代的肼与芳基碘化物的CuI催化偶联在60-90°C下进行,可选择性地提供N-酰基-N ',N'-双取代的肼,从而提供了一种简便的组装N的方法,N-二芳基肼。在CuI / 4-羟基-1-脯氨酸的催化下,N-酰基-N'-取代的肼还可在60-125°C下与2-溴芳基羰基化合物反应,生成1-芳基-1 H-吲唑。