Posttreatment Technique for S<sub>N</sub>2 Alkylation of Aromatics with Alkyl Halides: Aiming toward Large-Scale Synthesis of Building Blocks for Soft π-Molecular Materials
作者:Ken Okamoto、Fengniu Lu、Takashi Nakanishi
DOI:10.1246/bcsj.20180075
日期:2018.8.15
byproduct olefin contaminants in products of SN2 alkylation reactions of aromatic compounds can be efficiently removed by sequential posttreatments with a base and a boron compound (sodium borohydride or 9-borabicyclo[3.3.1]nonane), followed by column chromatography on silica gel. These treatments permit large-scale purification of various alkylated aromatics, thereby assisting in the development of soft
A fluorene derivative having both bromo and formyl groups exhibited bright phosphorescence emission in common organic solvents at room temperature. The absolute phosphorescence quantum yield reached 5.9% in chloroform at 298 K. When the fluorene derivative was incorporated into a poly(methyl methacrylate) film, the phosphorescence emission was similarly observed even under air at room temperature for over five days.
一种同时具有溴基和甲酰基的芴衍生物在室温下的普通有机溶剂中表现出明亮的磷光发射。在 298 K 的氯仿中,绝对磷光量子产率达到 5.9%。当把这种芴衍生物加入聚甲基丙烯酸甲酯薄膜中时,即使在室温空气中也能观察到类似的磷光发射,持续时间超过五天。