Action de l'acide fluorhydrique sur les azirines : synthèse d'α-fluorocétones et de difluoroamines - étude de l'orientation de la réaction
作者:Gérard Alvernhe、Sylvie Lacombe、André Laurent
DOI:10.1016/s0040-4039(00)92739-4
日期:——
Addition of Olah's reagent in benzene or methylene chloride to azirines leads to the formation of difluoroamines or α-fluoroketones. This reaction has been applied to the synthesis of 17 α-fluoropregnenolone. The formation of fluoroketone proceeds via a cationic intermediate. Yield is improved when using a more nucleophilic fluorinating reagent obtained by addition of triethylamine to Olah's reagent
将Olah试剂在苯或二氯甲烷中的叠氮基添加到叠氮基中会导致形成二氟胺或α-氟酮。该反应已应用于17α-氟孕烯醇酮的合成。氟代酮的形成通过阳离子中间体进行。当使用通过向奥拉试剂中添加三乙胺而获得的更具亲核性的氟化试剂时,收率得到提高。