作者:Nie, Jia、Jiang, Huanfeng、Zhu, Chuanle
DOI:10.1007/s11426-024-2128-7
日期:——
The chemoselective epoxidation of electron-deficient olefins in the presence of electron-rich alkene moieties is reported. This chemoselective epoxidation strategy undergoes a conjugated olefin epoxidation and BHT hydroxylation process to give various useful oxiranes in high yields, especially for the 2-substituted 2-trifluoromethyloxiranes. Importantly, this protocol features mild conditions, is transition-metal
报道了在富电子烯烃部分存在下缺电子烯烃的化学选择性环氧化。这种化学选择性环氧化策略经历了共轭烯烃环氧化和BHT羟基化过程,以高产率得到各种有用的环氧乙烷,特别是2-取代的2-三氟甲基环氧乙烷。重要的是,该协议的特点是条件温和,不含过渡金属,操作简单,克级可扩展,并且能够耐受不同的官能团。通过该方案顺利合成了候选药物HSD-16。机理研究表明分子氧是末端氧化剂和环氧乙烷的O源。