Copper(I) Oxide-Mediated Cyclization of<i>o</i>-Haloaryl<i>N</i>-Tosylhydrazones: Efficient Synthesis of Indazoles
作者:Meng Tang、Yuanfang Kong、Bingjie Chu、Dan Feng
DOI:10.1002/adsc.201500953
日期:2016.3.17
An efficient synthesis of indazoles from readily accessible E/Z mixtures of o‐haloaryl N‐tosylhydrazones has been developed. The thermo‐induced isomerization of N‐tosylhydrazones is discussed. A series of valuable indazole derivatives are prepared in good yields, and the method has been successfully applied to the synthesis of the bioactive compounds, lonidamine, AF‐2785, axitinib, YC‐1 and YD‐3.
从邻卤代芳基N-甲苯磺酰基hydr的易获得的E / Z混合物中开发了吲唑的有效合成方法。讨论了N-甲苯磺酰hydr的热诱导异构化。以高收率制备了一系列有价值的吲唑衍生物,该方法已成功地用于生物活性化合物的合成,如:lonidamine,AF-2785,axitinib,YC-1和YD-3。