S<sub>N</sub>2-Type Nucleophilic Opening of β-Thiolactones (Thietan-2-ones) as a Source of Thioacids for Coupling Reactions
作者:David Crich、Kasinath Sana
DOI:10.1021/jo9001728
日期:2009.5.1
3-arylthiopropionamides carrying various substituents in the 2-position. Alternatively, the trapping combination of an electron deficient aryl halide and an amine may be replaced by a 2,4-dinitrobenzenesulfonamide, resulting in the formation of the same products overall with the incorporation of the latent amine in the sulfonamide into the final amide product. In another embodiment, the thiocarboxylate intermediate
在3位上被烷基和氨基甲酰基单取代的β-硫内酯通过涉及S N的过程被芳硫醇盐进行亲核开环在4位上发生2型攻击,导致在3位上取代了3-芳基硫代丙酸酯。这些硫代羧酸盐可以通过亲山芳烃取代过程由Mukaiyama试剂或Sanger试剂原位捕获,从而导致高度活化的硫酯,然后使它们与伯胺或仲胺进一步反应,总体上导致一锅,三组分合成在2-位带有各种取代基的3-芳基硫代丙酰胺。或者,可用2,4-二硝基苯磺酰胺代替电子不足的芳基卤化物和胺的捕集组合,导致整体形成相同的产物,同时在磺酰胺中掺入潜伏胺到最终的酰胺产物中。在另一个实施例中,N-芳烃磺酰基3-芳基硫代丙酰胺衍生物。