Catalytic alkene difuntionalization is a convenient platform for introducing complexity in molecules and has wide applications in organic synthesis. Yet a compelling challenge that remains to be solved is the regioselective insertion of two highly functionalized carbon-based moieties, derived from stable and readily available organohalide electrophiles without the need for pre-synthesized organometallic reagents, across C=C bonds in unactivated alkyl-substituted alkenes. Here, we show that catalytic amounts of an inexpensive Ni-based catalyst, in combination with a readily recyclable 8-aminoquinoline directing group, promotes efficient and site-selective addition of two different organohalides (iodides and bromides) across aliphatic alkenes under mild reductive conditions. Compared to previous studies, this protocol exhibits broad and complementary functional group tolerance that extends to aryl-alkylation, alkenyl-alkylation, and dialkylation transformations. The utility of the strategy is demonstrated through concise synthesis of biologically active molecules. Kinetic studies and other control experiments shed further light on the mechanistic underpinnings of the multicomponent reaction.

催化烯烃的双官能化是在分子中引入复杂性的便利平台，在有机合成中具有广泛的应用。仍然需要解决的一个引人注目的挑战是在稳定的烷基取代基中的C = C键之间选择性地插入两个高度官能化的碳基基团，这些基团来自稳定且易于获得的有机卤化物亲电体，无需预先合成的有机金属试剂烯烃。在这里，我们显示出催化量的廉价镍基催化剂与易于回收的8-氨基喹啉导向基团的组合，可在温和的还原条件下，促进脂肪族烯烃中两种不同的有机卤化物（碘化物和溴化物）的高效定点添加。与以前的研究相比，该方案显示出广泛且互补的官能团耐受性，延伸至芳基烷基化，烯基烷基化和二烷基化转化。该策略的实用性通过生物活性分子的简明合成得到证明。动力学研究和其他对照实验进一步阐明了多组分反应的机理基础。