An unexpected synthesis of β-amino-α-mesyl-γ-sultams upon mesylation of hindered α-aminonitriles
作者:Maksim S. Dyachenko、Alexey V. Dobrydnev、Yaroslav O. Chuchvera、Svitlana V. Shishkina、Yulian M. Volovenko
DOI:10.1007/s10593-020-02671-y
日期:2020.3
unexpected synthesis of previously unknown 4-amino-5-methylsulfonyl-2,3-dihydroisothiazole 1,1-dioxides (also called β-amino-α-mesyl-γ-sultams). Thus, the reaction of mesyl chloride with hindered α-aminonitriles is accompanied by the formation of interim N-(1-cyanoalkyl)(methylsulfonyl)methanesulfonamides which, in turn, undergo the сarbanion-mediated sulfonate (sulfonamido) intramolecular cyclization
我们报告了以前未知的4-氨基-5-甲基磺酰基-2,3-二氢异噻唑1,1-二氧化物(也称为β-氨基-α-甲磺酰基-γ-sultams)的意外合成的一锅法程序。因此,甲磺酰氯与受阻的α-氨基腈的反应会伴随着形成中间的N-(1-氰基烷基)(甲基磺酰基)甲磺酰胺,这些酰胺又经历arbanion介导的磺酸盐(磺酰胺基)的分子内环化反应,生成β-氨基-α-甲磺酰基-γ-杜鹃花。通过X射线衍射研究证实了标题化合物的结构。所提出的反应机理的见解与其他实验和文献数据的结果一致。