Herein, we described the NH₄I-catalyzed CH bond chalcogenation of N-heteroaryls in the presence of a minimum amount of DMSO/H₂O/acetic acid as additives (2.5/2.5/1 M equiv., respectively), under metal-free conditions. Under optimized conditions, a wide variety of sulfenyl/selenyl imidazo[1,2-α]pyridines were prepared in very good yields. Moreover, the present approach was also highly efficient for the chalcogenation of different 5-membered N-heteroaryls, e.g., indole, imidazothiazole, indazole and imidazopyrimidine derivatives.

中文翻译：

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无金属条件下NH ₄ I催化5元N-杂芳基硫族元素（S / Se）官能化

在此，我们描述了在最少量的DMSO / H ₂ O /乙酸作为添加剂（分别为2.5 / 2.5 / 1 M当量）的存在下，NH ₄ I催化的N-杂芳基的C H键硫族化。无金属的条件。在优化的条件下，以非常好的收率制备了各种亚磺酰基/硒基咪唑并[1,2- α ]吡啶。而且，本方法对于不同的5元N-杂芳基，例如吲哚，咪唑并噻唑，吲唑和咪唑并嘧啶衍生物的硫属元素形成也是高效的。