reported. The diazenium intermediate was found to undergo cyclization to give indazoles in excellent yields. Alternatively, in the presence of nitriles, substituted 1,2,4-triazoles were obtained in good to excellent yields. This interesting diazenium route provides a new approach to achieve complex heterocycle synthesis under mild conditions.
报道了一种供体/受体重氮活化策略,即使用重氮盐通过缩合进行处理,而无需添加任何其他催化剂或试剂。发现 diazenium 中间体经过环化以极好的产率产生
吲唑。或者,在腈的存在下,取代的
1,2,4-三唑以良好至优异的收率获得。这种有趣的二
氮酮路线提供了一种在温和条件下实现复杂杂环合成的新途径。