A facile IrIII-catalyzed benzylicalkylation of arenes with alcohols has been accomplished via borrowing hydrogen (BH) pathways, and the newly developed spirocyclic NHC IrIII pincer complex (Cat A) serves as an efficient catalyst for this atom-economical and greener transformation. Some drug or bioactive molecules and functional material templates can be easily constructed by this strategy.
通过借氢 (BH) 途径实现了一种简单的 Ir III催化的芳烃与醇的苄基烷基化,新开发的螺环 NHC Ir III钳形配合物 (Cat A) 可作为这种原子经济和绿色转化的有效催化剂. 一些药物或生物活性分子和功能材料模板可以通过这种策略轻松构建。
Catalyst-free benzylic C(sp<sup>3</sup>)–H cross-coupling with organotrifluoroborates enabled by electrochemistry
作者:Chao Li、Ran Ding、Heng-Yi Guo、Shuang Xia、Lei Shu、Pei-Long Wang、Hongji Li
DOI:10.1039/d2gc02204d
日期:——
rare catalyst-free electrochemical cross-coupling of benzylic C–H bonds with organotrifluoroborates, which readily proceeds at room temperature and provides a unique protocol for forging C(sp3)–C(sp3), C(sp3)–C(sp2) and C(sp3)–C(sp) bonds. In particular, this work discloses the dual role of organotrifluoroborates serving both as a coupling partner and an electrolyte in C(sp3)–H functionalization.
AbstractA transition‐metal‐free intermolecular coupling reaction of halocompounds with styrenes in the presence of NaH and 1,10‐phenanthroline was developed. This reaction afforded hydrocarbonated products with complete anti‐Markovnikov selectivity. The method allows the use of a wide range of halocompounds, including aryl and alkyl halides, and good functional group tolerance. Detailed mechanistic studies indicated that an anilide anion generated in situ by the NaH‐mediated reduction of 1,10‐phenanthroline works as an electron donor and a hydrogen source.