Exploiting the Bis-Nucleophilicity of α-Aminoboronates: Copper-Catalyzed, Intramolecular Aminoalkylations of Bromobenzoyl Chlorides
作者:Aaron M. Dumas、Adrian J. Sieradzki、Liam J. Donnelly
DOI:10.1021/acs.orglett.6b00586
日期:2016.4.15
containing adjacent nucleophilic centers. We have developed an acylation/arylation reaction using 2-bromobenzoyl chlorides as bis-electrophiles that harnesses the nucleophilicity of both positions, leading to isoindolinones. The reactions proceed under mild conditions via an intramolecular, Cu-catalyzed sp3–sp2 coupling, giving products in up to 95% yield. These conditions enable arylation of α,α-disubstituted
α-氨基硼酸盐是包含相邻亲核中心的杂原子物种的有趣实例。我们已经开发出一种使用2-溴苯甲酰氯作为双亲电子试剂的酰化/芳基化反应,该反应可利用两个位置的亲核性,从而生成异吲哚啉酮。反应在温和条件下通过分子内Cu催化的sp 3 -sp 2偶联进行,从而使产物收率高达95%。这些条件使得α,α-二取代的氨基硼酸酯能够芳基化,这难以使用基于较少丰度和较昂贵的过渡金属的方法来完成。