Catalytic Asymmetric Synthesis of Branched Chiral Allylic Phenyl Ethers from (E)-Allylic Alcohols
作者:Angelaâ
C. Olson、Larryâ
E. Overman、Helenâ
F. Sneddon、Josephâ
W. Ziller
DOI:10.1002/adsc.200900678
日期:2009.12
family are reported and characterized crystallographically. The di-mu-amidate complex 3 or its enantiomer (ent-3) are the first asymmetric catalysts that allow commercially available, or readily accessible, (E)-2-alkene-1-ols to be transformed to enantioenriched branched allylic aryl ethers upon reaction of their trichloroacetimidate derivatives with phenols. The 3-aryloxy-1-alkene products are formed
报道了第一个二-mu-酰胺二钯配合物和一种新的 COP(钴恶唑啉钯环)钯 (II) 催化剂家族的二-mu-羧酸二钯配合物,并进行了晶体学表征。二-mu-酰胺配合物 3 或其对映异构体 (ent-3) 是第一个不对称催化剂,它允许市售或容易获得的 (E)-2-烯烃-1-醇转化为对映体富集的支链烯丙基芳基醚它们的三氯乙酰亚胺衍生物与酚类反应。3-芳氧基-1-烯烃产物以高对映体纯度(通常为90-98%ee)和有用产率(61-88%)形成。