Tanaka Kenta, Tanaka Yuta, Kishimoto Mami, Hoshino Yujiro, Honda Kiyoshi
Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
Beilstein J Org Chem. 2019 Sep 5;15:2105-2112. doi: 10.3762/bjoc.15.208. eCollection 2019.
An efficient synthesis of methoxy-substituted thioxanthylium salts has been developed. The reaction of diaryl sulfides with benzoyl chlorides in the presence of TfOH smoothly proceeded to give the desired thioxanthylium salts in good yields. In their UV-vis spectra, the maximum absorption wavelengths of methoxy-functionalized thioxanthylium salts were observed at around 460 nm, which show a drastic red shift compared to the parent thioxanthylium salts. The present reaction provides a versatile access to functionalized thioxanthylium salts, and therefore it constitutes a promising tool for the synthesis of biologically and photochemically active molecules.
已开发出一种高效合成甲氧基取代硫杂蒽鎓盐的方法。二芳基硫醚与苯甲酰氯在三氟甲磺酸（TfOH）存在下的反应顺利进行，以良好的产率得到所需的硫杂蒽鎓盐。在它们的紫外可见光谱中，观察到甲氧基官能化硫杂蒽鎓盐的最大吸收波长在460nm左右，与母体硫杂蒽鎓盐相比显示出显著的红移。本反应为官能化硫杂蒽鎓盐提供了一种通用的合成方法，因此它构成了一种用于合成生物和光化学活性分子的有前景的工具。
