arylketone-derived arylsulfonylhydrazones with NXS/(nBu)4NX affords exclusively vinyl halides. In contrast, we have found that treatment of arylaldehyde-derived arylsulfonylhydrazones with N-chlorosuccinimide in the presence of potassium hydroxide affords 1,2,4,5-tetrazine derivatives in good to excellent yields. The present reactions are carried out under metal-free and mild reaction conditions.
以前已有报道,用NXS /(n Bu)4 NX处理衍生自芳基酮的芳基磺酰基hydr,仅提供
乙烯基卤化物。相反,我们发现在
氢氧化钾的存在下,用N-
氯代琥珀
酰亚胺处理衍生自芳醛的芳基磺酰基hydr,可以很好地获得
1,2,4,5-四嗪衍
生物。本反应在无
金属和温和的反应条件下进行。