Divergent and Stereoselective Synthesis of Tetraarylethylenes from Vinylboronates
作者:Minghao Zhang、Yisen Yao、Peter J. Stang、Wanxiang Zhao
DOI:10.1002/anie.202008113
日期:2020.11.2
elucidated. TAEs have widespread applications in material science and supramolecular chemistry due to their aggregation‐inducedemission (AIE) properties. The divergent and stereoselective synthesis of [3+1]‐, [2+2]‐, and [2+1+1]‐TAEs via multiple couplings of vinylboronates with aryl bromides is demonstrated. These couplings feature a broad substrate scope and excellent functional group compatibility
Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor
作者:Kelley E. Danahy、Julian C. Cooper、Jeffrey F. Van Humbeck
DOI:10.1002/anie.201801280
日期:2018.4.23
A selective and mild method for the benzylic fluorination of aromatic azaheterocycles with Selectfluor is described. These reactions take place by a previously unreported mechanism, in which electron transfer from the heterocyclic substrate to the electrophilic fluorinating agent Selectfluor eventually yields a benzylic radical, thus leading to the desired C−F bond formation. This mechanism enables