Regio- and Enantioselective Allylation of Phenols<i>via</i>Decarboxylative Allylic Etherification of Allyl Aryl Carbonates Catalyzed by (Cyclopentadienyl)ruthenium(II) Complexes and Pyridine-Hydrazone Ligands
作者:Léo Egger、Cecilia Tortoreto、Thierry Achard、David Monge、Abel Ros、Rosario Fernández、José M. Lassaletta、Jérôme Lacour
DOI:10.1002/adsc.201500534
日期:2015.10.12
(Cyclopentadienyl)tris(acetonitrile)ruthenium hexafluorophosphate [CpRu(CH3CN)3][PF6] in combination with pyridine-hydrazone ligands efficiently catalyzes the asymmetric decarboxylative allylic rearrangement of allyl aryl carbonates. Formation of CO bonds with high regio- and enantioselectivity ratios (up to 95:5 and 98% ee) is obtained. Good stereocontrol of the pseudotetrahedral geometry of the CpRu
(环戊二烯基)三(乙腈)六氟磷酸钌[CpRu(CH 3 CN)3 ] [PF 6 ]与吡啶hydr配体结合可有效催化烯丙基芳基碳酸酯的不对称脱羧烯丙基重排。获得具有高区域和对映体选择性比率(高达95:5和98%ee)的CO键的形成。hydr配体可实现对CpRu部分伪四面体几何形状的良好立体控制,其六价配位的TRISPHAT-N阴离子的差向异构化证明了其“电子贫乏”的性质。