Direct Conversion of Primary Alcohols to 1,2-Amino Alcohols: Enantioselective Iridium-Catalyzed Carbonyl Reductive Coupling of Phthalimido-Allene via Hydrogen Auto-Transfer
作者:Kim Spielmann、Ming Xiang、Leyah A. Schwartz、Michael J. Krische
DOI:10.1021/jacs.9b08715
日期:2019.9.11
primary alcohols 2a-2z, 2a'-2c' engage in hydrogen auto-transfer-mediated carbonyl reductive coupling by way of (α-amino)allyliridium-aldehyde pairs to form vicinal amino alcohols 3a-3z, 3a'-3c' with high levels of regio-, anti-diastereo-, and enantioselectivity. Reaction progress kinetic analysis and isotopic labeling studies corroborate a catalytic cycle involving turnover-limiting alcohol dehydrogenation
描述了第一个催化对映选择性羰基(α-氨基)烯丙基化。邻苯二甲酰亚胺-丙二烯 1 和伯醇 2a-2z, 2a'-2c' 通过(α-氨基)烯丙基铱-醛对参与氢自动转移介导的羰基还原偶联,形成邻氨基醇 3a-3z, 3a' -3c' 具有高水平的区域选择性、反非对映选择性和对映选择性。反应进程动力学分析和同位素标记研究证实了催化循环,包括限制周转的醇脱氢,然后是快速丙二烯加氢金属化。