2-烯基苯酚和烯酰胺的催化对映选择性卤环化已经通过使用手性酰胺磷酸盐催化剂和卤代路易斯酸实现。密度泛函理论计算表明催化剂的路易斯碱度在反应性和对映选择性中起重要作用。所得手性卤代色满可以在短时间内转化为 α-生育酚、α-生育三烯酚、代达林 A 和英格列酮。此外,具有不饱和侧链的卤化产物可在自由基环化条件下提供多环加合物。
2-烯基苯酚和烯酰胺的催化对映选择性卤环化已经通过使用手性酰胺磷酸盐催化剂和卤代路易斯酸实现。密度泛函理论计算表明催化剂的路易斯碱度在反应性和对映选择性中起重要作用。所得手性卤代色满可以在短时间内转化为 α-生育酚、α-生育三烯酚、代达林 A 和英格列酮。此外,具有不饱和侧链的卤化产物可在自由基环化条件下提供多环加合物。
[EN] PROCESSES FOR THE PREPARATION OF ORTHO-ALLYLATED HYDROXY ARYL COMPOUNDS<br/>[FR] PROCÉDÉS DE PRÉPARATION DE COMPOSÉS HYDROXY-ARYLE ORTHO-ALLYLÉS
申请人:UNIV MCMASTER
公开号:WO2021237371A1
公开(公告)日:2021-12-02
The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (I).
A new chiral tethered 8-quinolinol-based ligand class is developed. The binuclear titanium complex of the ligand operates through a novel mechanism allowing for the regio- and stereoselective epoxidation of primary and tertiary homoallylic alcohols (up to 98% ee), as well as first examples of 2-allylic phenols (up to 92% ee). The new catalyst system also promotes the asymmetric oxidation of gamma-hydroxypropyl sulfides giving an important class of chiral sulfoxides that have been inaccessible to date (up to 95% ee).
Enantioselective Selenocyclization via Dynamic Kinetic Resolution of Seleniranium Ions by Hydrogen-Bond Donor Catalysts
作者:Hu Zhang、Song Lin、Eric N. Jacobsen
DOI:10.1021/ja510113s
日期:2014.11.26
Highly enantioselective selenocyclization reactions are promoted by the combination of a new chiral squaramide catalyst, a mineral acid, and an achiral Lewis base. Mechanistic studies reveal that the enantioselectivity originates from the dynamic kinetic resolution of seleniranium ions through anion-binding catalysis.
Competition between Cyclization and Dehalogenation in the Photochemistry of Cinnamylphenols with Halogen Substituents at the Phenolic and Styrenic Chromophores
作者:M. Consuelo Jiménez、Miguel A. Miranda、Rosa Tormos
DOI:10.1021/jo971621m
日期:1998.2.1
PROCESSES FOR THE PREPARATION OF ORTHO-ALLYLATED HYDROXY ARYL COMPOUNDS
申请人:McMaster University
公开号:US20210380513A1
公开(公告)日:2021-12-09
The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (I).