Rhodium‐Catalyzed Parallel Kinetic Resolution of Racemic Internal Allenes Towards Enantiopure Allylic 1,3‐Diketones
作者:Lukas J. Hilpert、Bernhard Breit
DOI:10.1002/anie.201903365
日期:2019.7.15
parallel kinetic resolution of racemic 1,3‐disubstituted allenes by means of a rhodium‐catalyzed addition to 1,3‐diketones furnishing enantiopure allylic 1,3‐diketones is described. Mechanistic experiments demonstrate that the different allene enantiomers react in parallel to either the diastereomeric E‐ or Z‐allylic 1,3‐diketones with the same absolute configuration of the newly formed stereogenic
描述了一种罕见的情况,即通过铑催化向1,3-二酮中添加外消旋的1,3-二取代的烯类,同时提供对映体纯的烯丙基1,3-二酮。机理实验表明,不同的丙二烯对映异构体与非对映异构体E-或Z-烯丙基1,3-二酮平行反应,且具有与新形成的立体异构中心相同的绝对构型。广泛的底物范围证明了这种新方法的综合实用性。