Studies on Synthetic Approaches to 1<i>H</i>- and 2<i>H</i>-Indazolyl Derivatives
作者:Emre M. Isin、Milly de Jonge、Neal Castagnoli
DOI:10.1021/jo005786y
日期:2001.6.1
2H-indazolyl derivatives of potential biological interest are reported. Special emphasis has been placed on the characterization of indazolylpyridinium products generated from reactions between indazole and 4-chloro-1-methylpyridinium iodide under various conditions. A stable mixture consisting of 3 parts of the 1H-isomer 9 to 1 part of the 2H-isomer 10 was obtained at room temperature in the presence
据报道,旨在提供具有潜在生物学意义的1H-和2H-吲唑基衍生物的合成方法。特别强调了在不同条件下由吲唑与4-氯-1-甲基吡啶碘化物反应生成的吲唑基吡啶鎓产物的特性。在室温下在碱2,2,6,6-四甲基哌啶(TMP)的存在下,获得了由3份1H-异构体9到1份2H-异构体10组成的稳定混合物。在60℃下的相同反应仅得到1H-异构体9。在100℃下,在不存在TMP的情况下,仅形成2H-异构体10。发现10至9的异构化在60℃下定量进行,但仅在TMP存在下进行。