Iodine(III) Enabled Dehydrogenative Aryl C−S Coupling by in situ Generated Sulfenium Ion
作者:Khokan Choudhuri、Saikat Maiti、Prasenjit Mal
DOI:10.1002/adsc.201801510
日期:2019.3.5
Due to the normal polarity preferences, arenes form stable complexes with thiols through S−H⋅⋅⋅π interaction and direct dehydrogenative aryl C−S coupling is usually restricted. We report here an umpolung based one pot and direct C−S coupling approach under metal free and mild condition. Electrophile sulfenium ions were generated in situ from thiols using iodine(III) reagent PhI(OAc)2 (PIDA) and subsequently
由于正常的极性偏好,芳烃通过SH·⋅·π相互作用与硫醇形成稳定的络合物,通常直接脱氢芳基CS偶联受到限制。我们在这里报告了一种在无金属和温和条件下基于umpolung的单罐和直接CS耦合方法。使用碘(III)试剂PhI(OAc)2(PIDA)从硫醇中原位生成亲电子sulf离子,然后将其用于芳族亲电子取代(EArS)以合成二芳基硫醚。同样通过使用适量的PIDA,CS和S = O键的级联合成可在一锅中产生芳基亚硫酰基芳烃。共价自选或竞争实验进一步证实了sulf离子参与了EArS。