Jin Jian, MacMillan David W C
Merck Center for Catalysis at Princeton University, Washington Road, Princeton, NJ 08544 (USA) http://www.princeton.edu/chemistry/macmillan/
Angew Chem Int Ed Engl. 2015 Jan 26;54(5):1565-9. doi: 10.1002/anie.201410432. Epub 2014 Dec 2.
The direct α-arylation of cyclic and acyclic ethers with heteroarenes has been accomplished through the design of a photoredox-mediated CH functionalization pathway. Transiently generated α-oxyalkyl radicals, produced from a variety of widely available ethers through hydrogen atom transfer (HAT), were coupled with a range of electron-deficient heteroarenes in a Minisci-type mechanism. This mild, visible-light-driven protocol allows direct access to medicinal pharmacophores of broad utility using feedstock substrates and a commercial photocatalyst.
通过设计光氧化还原介导的CH官能化途径,实现了环状和非环状醚与杂芳烃的直接α-芳基化反应。通过氢原子转移(HAT)从各种广泛可得的醚类中瞬态生成的α-氧代烷基自由基,以Minisci型机理与一系列缺电子杂芳烃偶联。这种温和的可见光驱动方法允许使用原料底物和市售光催化剂直接获得具有广泛用途的药用基团。