Chiral Primary Amine/Palladium Dual Catalysis for Asymmetric Allylic Alkylation of β-Ketocarbonyl Compounds with Allylic Alcohols
作者:Han Zhou、Long Zhang、Changming Xu、Sanzhong Luo
DOI:10.1002/anie.201505946
日期:2015.10.19
promote the direct asymmetric allylic alkylation (AAA) of β‐ketocarbonyl compounds. In particular, the synergistic dual catalytic system enabled the AAA reaction of challenging acyclic aliphatic ketones, such as β‐ketocarbonyl compounds and 1,3‐diketones.
π-Coordinating Chiral Primary Amine/Palladium Synergistic Catalysis for Asymmetric Allylic Alkylation
作者:Yaning Wang、Junli Chai、Chang You、Jie Zhang、Xueling Mi、Long Zhang、Sanzhong Luo
DOI:10.1021/jacs.9b13026
日期:2020.2.12
synergistic catalysis for asymmetric allylic alkylation of α-branched β-ketocarbonyls. The use of arene-containing chiral primary amine catalyst led to not only enhanced reaction rate but also reversed chiral induction comparing with its sterically bulky derivative. Both enantiomers of the allylic adducts bearing acyclic all-carbon quaternary stereocenters could be obtained from the same configured chiral aminocatalyst
The catalytic asymmetric alkylation of alpha-cyanocarboxylates and acetoacetates with an alkyl halide was performed under phase-transfer conditions to afford compounds which have a chiral quaternary carbon with up to 97% and 94% ee, respectively. As applications of this method, chiral 2-oxindole derivatives and a beta-lactam derivative were synthesized. (C) 2009 Elsevier Ltd. All rights reserved.
Palladium-catalyzed asymmetric allylations of chiral enamines bearing phosphine functionality. Effects of anionic counterparts of allylating reagents on asymmetric induction
作者:Kunio Hiroi、Jun Abe
DOI:10.1016/s0040-4039(00)94460-5
日期:1990.1
Asymmetric induction reactions. IV. Palladium-catalyzed asymmetric allylations of chiral enamines bearing phosphine groups.
作者:Kunio HIROI、Jun ABE
DOI:10.1248/cpb.39.616
日期:——
The palladium-catalyzed asymmetric allylations of chiral enamines, derived from (S)-2-(diphenylphosphinomethyl)pyrrolidine, produced optically active α-allyl carbonyl compounds in high optical yields. The phosphino group in the chiral enamines presumably serves as a chiral ligand in these palladium-catalyzed reactions. In the transition states of π-allylpalladium complexes coordinated with the intramolecular phosphine group, the anionic counterparts or allylating reagents are considered to play an important role in controlling of the grade of the enantioselectivity.