Suzuki-Type Cross-Coupling Reaction of Unprotected 3-Iodoindazoles with Pinacol Vinyl Boronate: An Expeditive C-3 Vinylation of Indazoles under Microwave Irradiation
作者:Gonzalo Vera、Benjamín Diethelm、Claudio Terraza、Gonzalo Recabarren-Gajardo
DOI:10.3390/molecules23082051
日期:——
C-5 substituted 3-iodoindazole derivatives. In all cases, the C-3 vinylated derivative was the only isolated product. This methodology allows access to 3-vinylated indazoles selectively and directly without the need of N-protection. 3-Vinylindazoles could be interesting synthetic intermediates allowing access to biologically active molecules.
本文中,我们报告了微波辐射下未保护的3-碘吲唑的便捷C-3乙烯基化。通过这种方法合成了十种C-5取代的3-乙烯基吲唑衍生物,其中九种是新颖的,从C-5取代的3-碘吲唑衍生物开始,以中等至优异的产率进行。在所有情况下,C-3乙烯基化衍生物都是唯一的分离产物。这种方法可以选择性地和直接地获得3-乙烯基化的吲唑,而无需N-保护。3-乙烯基吲唑可能是有趣的合成中间体,可以接触生物活性分子。