Keiji Maruoka
Kyoto University
913 Papers
8.2K Citations
Keiji Maruoka is an academic researcher from Kyoto University. The author has contributed to research in topics: Catalysis & Enantioselective synthesis. The author has an hindex of 76, co-authored 885 publications. Previous affiliations of Keiji Maruoka include Sumitomo Chemical & Nagasaki University.
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Papers
Asymmetric 1 ,3-Dipolar Cycloaddition Reaction of Nitrones and Acrolein with a Bis-Titanium Catalyst as Chiral Lewis Acid
TL;DR: A mu-oxo-type chiral bis-Ti(IV) oxide (S,S)-1 can be successfully utilized in the asymmetric 1,3-dipolar cycloaddition reactions between various nitrones 2 and acrolein to give the corresponding isoxazolidines with high to excellent enantioselectivities.
α-Chiral Acetylenes Having an All-Carbon Quaternary Center: Phase Transfer Catalyzed Enantioselective α Alkylation of α-Alkyl-α-alkynyl Esters
TL;DR: The title reaction was found to proceed by an initial base-mediated isomerization to allenyl esters and subsequent phase transfer catalyzed alkylation at the alpha position of the ester.
Construction of Quaternary Carbon Center by Catalytic Asymmetric Alkylation of 3-Arylpiperidin-2-ones Under Phase-Transfer Conditions
TL;DR: A highly enantioselective synthesis of δ-lactams having a chiral quaternary carbon center at the α-position has been developed through an asymmetric alkylation of 3-arylpiperidin-2-ones under phase-transfer conditions.
The Basic Principle of Phase‐Transfer Catalysis and Some Mechanistic Aspects
Takuya Hashimoto,Keiji Maruoka +1 more
- 11 Jun 2008
TL;DR: In this paper, Starks introduced the term ''phase transfer catalysis'' to explain the critical role of tetraalkylammonium or phosphonium salts in the reactions between two substances located in different immiscible phases.