Synthesis of new phenylpyridyl scaffolds using the Garlanding approach
摘要:
One-pot reaction for the synthesis of novel phenylpyridyl derivatives and mixed quater phenylpyridyl compounds is described by using the Garlanding approach The reactions proceed with moderate to good yields in mild conditions and good reaction times This work represents a second application of the simplicity and versatility of Garlanding concept for the construction of new phenylpyridyl scaffolds. which can be considered as non-peptidic foldamer alpha-helix numerics. (C) 2010 Published by Elsevier Ltd.
without an external base for the synthesis, with excellent functional-group tolerance of asymmetric biaryls. Both coupling partners are readily available, bench-stable, and non-toxic. A broad array of (pseudo)halogenated and borylated coupling partners can be successfully applied to this site-specific biaryl coupling with unprecedented versatility. Its synthetic value has been substantiated by concise preparation
The synthesis of novel photochromic diarylethenes bearing a biphenyl moiety and the effects of substitution on their properties
作者:Shouzhi Pu、Wenjuan Miao、Shiqiang Cui、Gang Liu、Weijun Liu
DOI:10.1016/j.dyepig.2010.04.005
日期:2010.11
investigated. Under alternating irradiation with UV and visible light, the compounds exhibited good photochromism and functioned as fluorescent photoswitches both in solution and in PMMA film. Electron-donating substituents shifted the λmax of the diarylethenes to longer wavelengths and decreased their cyclization quantum yield, while electron-withdrawing substituents greatly increased both cyclization
作者:Marco Di Giovannantonio、Qiang Chen、José I. Urgel、Pascal Ruffieux、Carlo A. Pignedoli、Klaus Müllen、Akimitsu Narita、Roman Fasel
DOI:10.1021/jacs.0c05701
日期:2020.7.29
Fully conjugated ladder polymers (CLP) possess unique optical and electronic properties, and are considered promis-ing materials for applications in (opto)electronic devices. Poly(indenoindene) is a CLP consisting of an alternatingarray of five- and six-membered rings, which has remained elusive so far. Here, we report an on-surface synthesis of oligo(indenoindene) on Au(111). Its structure and a
Oxazaborolidinones: Steric Coverage Effect of Lewis Acidic Boron Center in Suzuki–Miyaura Coupling Reactions
作者:Naoki Tsuchiya、Takaki Nojiri、Takashi Nishikata
DOI:10.1002/chem.202303271
日期:2024.2.12
moiety of oxazaborolidinone (OxB) dynamically covers the Lewis acidic boron center, providing stabilizing effects on unstable boronic acids including 2-furyl, vinyl, and alkyl groups and protective effects on OxB with haloaryl groups. Reported protection is useful for iterative couplings and Suzuki–Miyaura couplingreactions with OxBs prepared from unstable arylboronic acids.