thiophenes can be difunctionalized site- and regio-selectively at the C4 and C5 positions in good yields, enabled by an arsine ligand and a unique amide-based NBE. The synthetic utility has been shown in derivatizations of complex bioactive compounds and an open-flask gram-scale preparation. Preliminary results have been obtained in the difunctionalization of furans and a direct C4-selective arylation of
在此,我们报告了通过
钯/
降冰片烯 (Pd/NBE) 协同催化的
噻吩的直接邻位双官能化。在胂
配体和独特的基于酰胺的 NBE 的支持下,一系列单和双取代的
噻吩可以在 C4 和 C5 位置以良好的产率进行位点和区域选择性双官能化。合成效用已在复杂
生物活性化合物的衍生化和开放烧瓶克级制备中显示出来。已经在
呋喃的双官能化和 2-取代
噻吩的直接 C4 选择性芳基化中获得了初步结果。