Acceptorless Dehydrogenative Synthesis of Pyrimidines from Alcohols and Amidines Catalyzed by Supported Platinum Nanoparticles
作者:Sharmin Sultana Poly、S. M. A. Hakim Siddiki、Abeda S. Touchy、Kah Wei Ting、Takashi Toyao、Zen Maeno、Yasuharu Kanda、Ken-ichi Shimizu
DOI:10.1021/acscatal.8b02814
日期:2018.12.7
Pt-catalyzed acceptorless dehydrogenation of the alcohol substrate, which is followed by sequential condensation, cyclization, and dehydrogenation. Measurements of the turnover frequency combined with the results of density functional theory calculations on different metal surfaces suggest that the adsorption energy of H on the Pt surface is optimal for the acceptorless dehydrogenation process, which causes
一种单锅无受体脱氢方法,使用碳载Pt催化剂(Pt / C)和KO t已开发出用于从仲和伯醇和synthesis合成2,4,6-三取代的嘧啶的Bu。使用各种各样的底物范围(32个实例,分离出的收率高达92%)有效地进行了反应。促进此过程的Pt / C催化剂可重复使用,并且比以前报道的方法具有更高的周转率(TON)。机理研究的结果表明,该过程是通过以下途径发生的,该途径始于Pt催化的醇底物的无受体脱氢,然后依次进行缩合,环化和脱氢。