One step synthesis of unsymmetrical 1,3-disubstituted BCP ketones <i>via</i> nickel/photoredox-catalyzed [1.1.1]propellane multicomponent dicarbofunctionalization
作者:Weichen Huang、Sebastian Keess、Gary A. Molander
DOI:10.1039/d2sc05100a
日期:——
Bicyclo[1.1.1]pentanes (BCPs), utilized as sp3-rich bioisosteres for tert-butyl- and aryl groups as well as internal alkynes, have gained considerable momentum in drug development programs. Although many elegant methods have been developed to access BCP amines and BCP aryls efficiently, the methods used to construct BCP ketones directly are relatively underdeveloped. In particular, the preparation
双环[1.1.1]戊烷(BCP)用作叔丁基和芳基以及内炔烃的富含sp 3的生物等排体,在药物开发项目中获得了相当大的发展势头。尽管已经开发出许多优雅的方法来有效地获取 BCP 胺和 BCP 芳基,但用于直接构建 BCP 酮的方法相对不发达。特别是,不对称 1,3-二取代-BCP 酮的制备仍然具有挑战性,并且仍然需要多个化学步骤。本文报道了一种通过镍/光氧化还原催化制备多功能二取代 BCP 酮的单步、多组分方法。重要的是,在 BCP 结构附近的碳位置安装硼基团绕过了三级 BF 3 K 偶联伙伴的限制,从而扩大了该范例的范围。将二取代的 BCP 酮进一步转化为各种其他 BCP 衍生物,证明了这种开发方法的合成价值。