Esterification of Tertiary Amides by Alcohols Through C−N Bond Cleavage over CeO
<sub>2</sub>
作者:Takashi Toyao、Md. Nurnobi Rashed、Yoshitsugu Morita、Takashi Kamachi、S. M. A. Hakim Siddiki、Md. A. Ali、A. S. Touchy、Kenichi Kon、Zen Maeno、Kazunari Yoshizawa、Ken‐ichi Shimizu
DOI:10.1002/cctc.201801098
日期:2019.1.9
process proceeds through rate limiting addition of a CeO2 lattice oxygen to the carbonyl group of the adsorbed acetamide species with energy barrier of 17.0 kcal/mol. This value matches well with experimental value (17.9 kcal/mol) obtained from analysis of the Arrhenius plot. Further studies by in situ FT‐IR and temperature programmed desorption using probe molecules demonstrate that both acidic and
已经发现CeO 2促进叔酰胺形成酯的醇解反应。本催化体系操作简单,可回收,并且不需要添加剂。酯化过程显示出较宽的底物范围(> 45个实例;分离产率高达93%)。密度泛函理论(DFT)研究与现场FT-IR观察相结合的结果表明,该过程通过速率限制将CeO 2晶格氧加到吸附的乙酰胺类化合物的羰基上进行,能量垒为17.0 kcal / mol 。该值与通过分析Arrhenius图获得的实验值(17.9 kcal / mol)很好地匹配。原位进一步研究FT-IR和使用探针分子的程序升温脱附表明,酸性和碱性性质均很重要,因此,CeO 2对CN键断裂反应表现出最佳性能。