Hydroamination versus Allylic Amination in Iridium-Catalyzed Reactions of Allylic Acetates with Amines: 1,3-Aminoalcohols via Ester-Directed Regioselectivity
作者:Seung Wook Kim、Thomas Wurm、Gilmar A. Brito、Woo-Ok Jung、Jason R. Zbieg、Craig E. Stivala、Michael J. Krische
DOI:10.1021/jacs.8b05683
日期:2018.7.25
In the presence of a neutral dppf-modified iridium catalyst and Cs2CO3, linear allylic acetates react with primary amines to form products of hydroamination with complete 1,3-regioselectivity. The collective data, including deuterium labeling studies, corroborate a catalytic mechanism involving rapid, reversible acetate-directed aminoiridation with inner-sphere/outer-sphere crossover followed by turnover-limiting
在中性 dppf 改性的铱催化剂和 Cs2CO3 存在下,线性烯丙基乙酸酯与伯胺反应形成具有完全 1,3-区域选择性的加氢胺化产物。包括氘标记研究在内的集体数据证实了一种催化机制,该机制涉及快速、可逆的醋酸盐导向氨基环化,内球/外球交叉,然后是由胺介导的限制营业额的原脱金属。