作者:Jeffrey A Campbell、Chris A Broka、Leyi Gong、Keith A.M Walker、Jin-Hai Wang
DOI:10.1016/j.tetlet.2004.03.153
日期:2004.5
The direct 3-arylthiolation of 2-substituted indoles using phenyliodine(III)bis trifluoroacetate (PIFA) in (CF3)2CHOH with a wide variety of benzenethiols has been accomplished. In particular, indoles bearing a 6-MeSO2 and either a 2-methyl or 2-carboxymethyl substituent could be 3-arylthiolated in good to excellent yields to afford the corresponding 3-arylthioindoles as selective COX-2 inhibitors
使用(CF 3)2 CHOH中的苯基碘(III)双三氟乙酸酯(PIFA)与多种苯硫醇进行了2-取代的吲哚的直接3-芳基硫醇化反应。尤其是,带有6-MeSO 2和2-甲基或2-羧甲基取代基的吲哚可以良好的产率以优异的产率被3-芳基硫醇化,以提供相应的3-芳基硫吲哚作为选择性COX-2抑制剂。在改变2-CO 2 Et吲哚的5-取代基的电子性质的研究中,发现随着取代基变得更吸电子,反应的产率提高。该结果与提出的涉及中间体3-IPh吲哚配合物的苯硫醇置换的机理相一致。