List of works - Takashi Ooi

A femtomolar-range suicide germination stimulant for the parasitic plant Striga hermonthica

scientific article published on 01 December 2018

Asymmetric induction in the Neber rearrangement of simple ketoxime sulfonates under phase-transfer conditions: experimental evidence for the participation of an anionic pathway.

scientific article published in July 2002

Asymmetric organocatalysis of structurally well-defined chiral quaternary ammonium fluorides

scientific article published on 01 August 2004

Asymmetric strecker reaction of aldimines using aqueous potassium cyanide by phase-transfer catalysis of chiral quaternary ammonium salts with a tetranaphthyl backbone.

scientific article published in March 2006

Asymmetric substitution at the tetrasubstituted chiral carbon: catalytic ring-opening alkylation of racemic 2,2-disubstituted aziridines with 3-substituted oxindoles.

scientific article published on 10 December 2013

Asymmetric synthesis of functionalized aza-cyclic amino acids with quaternary stereocenters by a phase-transfer-catalyzed alkylation strategy

scientific article published on 01 January 2005

Base-catalyzed direct aldolization of α-alkyl-α-hydroxy trialkyl phosphonoacetates.

scientific article published on 04 April 2012

Carbene transfer from triazolylidene gold complexes as a potent strategy for inducing high catalytic activity

scientific article published on 21 August 2013

Catalyst-Directed Guidance of Sulfur-Substituted Enediolates to Stereoselective Carbon-Carbon Bond Formation with Aldehydes

scientific article published on 13 March 2018

Catalyst-Enabled Site-divergent Stereoselective Michael Reactions: Overriding Intrinsic Reactivity of Enynyl Carbonyl Acceptors

scientific article published on 13 February 2018

Catalytic Asymmetric Oxidation of N-Sulfonyl Imines with Hydrogen Peroxide–Trichloroacetonitrile System ⬇️

scientific article published on May 20, 2013

Catalytic asymmetric Mannich-type reactions of α-cyano α-sulfonyl carbanions

scientific article published on 01 June 2012

Catalytic asymmetric direct Henry reaction of ynals: short syntheses of (2S,3R)-(+)-xestoaminol C and (-)-codonopsinines

scientific article published on 01 October 2010

Catalytic asymmetric protonation of alpha-amino acid-derived ketene disilyl acetals using P-spiro diaminodioxaphosphonium barfates as chiral proton

scientific article published on 01 September 2010

Catalytic asymmetric rearrangement of alpha,alpha-disubstituted alpha-siloxy aldehydes to optically active acyloins using axially chiral organoaluminum Lewis acids

scientific article published on 10 February 2007

Catalytic asymmetric ring openings of meso and terminal aziridines with halides mediated by chiral 1,2,3-triazolium silicates

scientific article published on 16 May 2012

Catalytic asymmetric synthesis of a nitrogen analogue of dialkyl tartrate by direct mannich reaction under phase-transfer conditions

scientific article published on 01 July 2004

Cationic Organic Catalysts or Ligands in Concert with Metal Catalysts

scientific article published on 25 October 2019

Chemistry. Heat and light switch a chiral catalyst and its products

scientific article

Chiral 1,2,3-triazoliums as new cationic organic catalysts with anion-recognition ability: application to asymmetric alkylation of oxindoles

scientific article published on 04 January 2011

Chiral ammonium betaine-catalyzed highly stereoselective aza-henry reaction of α-aryl nitromethanes with aromatic N-Boc imines.

scientific article

Chiral ammonium betaines as ionic nucleophilic catalysts

scientific article published on 01 July 2010

Chiral ammonium betaines: a bifunctional organic base catalyst for asymmetric Mannich-type reaction of alpha-nitrocarboxylates.

scientific article

Chiral arylaminophosphonium barfates as a new class of charged brønsted acid for the enantioselective activation of nonionic Lewis bases

scientific article published on 01 June 2009

Chiral organic ion pair catalysts assembled through a hydrogen-bonding network.

scientific article published on 27 August 2009

Chiral tetraaminophosphonium salt-mediated asymmetric direct Henry reaction.

scientific article published on 20 September 2007

Complete diastereodivergence in asymmetric 1,6-addition reactions enabled by minimal modification of a chiral catalyst.

scientific article published on 20 March 2017

Complete switch of migratory aptitude in aluminum-catalyzed 1,2-rearrangement of differently alpha,alpha-disubstituted alpha-siloxy aldehydes

scientific article published on 01 January 2008

Construction of enantiomerically enriched tertiary alpha-hydroxycarboxylic acid derivatives by phase-transfer-catalyzed asymmetric alkylation of diaryloxazolidin-2,4-diones

scientific article published on 01 June 2006

Controlled assembly of chiral tetraaminophosphonium aryloxide-arylhydroxide(s) in solution

scientific article published on 16 March 2011

Correction to "Generation of Chiral Phosphonium Dialkyl Phosphite as a Highly Reactive P-Nucleophile: Application to Asymmetric Hydrophosphonylation of Aldehydes".

scientific article published on 14 February 2017

Design of N-spiro C2-symmetric chiral quaternary ammonium bromides as novel chiral phase-transfer catalysts: synthesis and application to practical asymmetric synthesis of alpha-amino acids.

scientific article published in April 2003

Design of chiral organocatalysts for practical asymmetric synthesis of amino acid derivatives

scientific article published on 08 December 2006

Design of new chiral phase-transfer catalysts with dual functions for highly enantioselective epoxidation of alpha,beta-unsaturated ketones.

scientific article

Designer chiral quaternary ammonium bifluorides as an efficient catalyst for asymmetric nitroaldol reaction of silyl nitronates with aromatic aldehydes.

scientific article published in February 2003

Determination of the absolute configuration of compounds bearing chiral quaternary carbon centers using the crystalline sponge method

scientific article published on 16 May 2017

Development of highly diastereo- and enantioselective direct asymmetric aldol reaction of a glycinate Schiff base with aldehydes catalyzed by chiral quaternary ammonium salts.

scientific article

Diastereo- and enantioselective phase-transfer alkylation of 3-substituted oxindoles with racemic secondary alkyl halides.

scientific article published on 2 November 2017

Direct allylic C-H alkylation of enol silyl ethers enabled by photoredox-Brønsted base hybrid catalysis.

scientific article published on 20 June 2019

Distinct advantage of the in situ generation of quaternary ammonium fluorides under phase-transfer conditions toward catalytic asymmetric synthesis

scientific article published on 01 May 2001

Dramatic rate enhancement of asymmetric phase-transfer-catalyzed alkylations

scientific article published on 01 January 2005

Enantioselective amino acid synthesis by chiral phase-transfer catalysis.

scientific article published in August 2003

Enantioselective formal α-allylation of nitroalkanes through a chiral iminophosphorane-catalyzed Michael reaction-Julia-Kocienski olefination sequence

scientific article published on 20 February 2014

Enantioselective protonation of α-hetero carboxylic acid-derived ketene disilyl acetals under chiral ionic Brønsted acid catalysis.

scientific article published in November 2014

Enantioselective reductive multicomponent coupling reactions between isatins and aldehydes.

scientific article

Esterification of carboxylic acids catalyzed by in situ generated tetraalkylammonium fluorides

Exploiting the Modularity of Ion-Paired Chiral Ligands for Palladium-Catalyzed Enantioselective Allylation of Benzofuran-2(3H)-ones ⬇️

scientific article published on December 31, 2012

Generation of chiral phosphonium dialkyl phosphite as a highly reactive P-nucleophile: application to asymmetric hydrophosphonylation of aldehydes

scientific article published on 01 March 2009

Highly E-Selective and Enantioselective Michael Addition to Electron-Deficient Internal Alkynes Under Chiral Iminophosphorane Catalysis.

scientific article published in July 2015

Highly diastereo- and enantioselective formal conjugate addition of nitroalkanes to nitroalkenes by chiral ammonium bifluoride catalysis

scientific article published on 01 November 2006

Highly enantioselective construction of quaternary stereocenters on beta-keto esters by phase-transfer catalytic asymmetric alkylation and Michael reaction

scientific article published on 01 August 2003

Highly enantioselective michael addition of silyl nitronates to alpha,beta-unsaturated aldehydes catalyzed by designer chiral ammonium bifluorides: efficient access to optically active gamma-nitro aldehydes and their enol silyl ethers.

scientific article published in July 2003

Highly regio-, diastereo-, and enantioselective 1,6- and 1,8-additions of azlactones to di- and trienyl N-acylpyrroles

scientific article published on 14 November 2012

Highly stereoselective N-terminal functionalization of small peptides by chiral phase-transfer catalysis.

scientific article

Importance of chiral phase-transfer catalysts with dual functions in obtaining high enantioselectivity in the Michael reaction of malonates and chalcone derivatives

scientific article published on 01 July 2005

Independence from the Sequence of Single-Electron Transfer of Photoredox Process in Redox-Neutral Asymmetric Bond-Forming Reaction

scientific article published on 13 May 2016

Inserting Nitrogen: An Effective Concept To Create Nonplanar and Stimuli-Responsive Perylene Bisimide Analogues

scientific article published on 05 December 2019

Ion-paired chiral ligands for asymmetric palladium catalysis

scientific article published on 01 April 2012

Ionic nucleophilic catalysis of chiral ammonium betaines for highly stereoselective aldol reaction from oxindole-derived vinylic carbonates

scientific article published on 12 April 2012

Ligand-controlled E/Z selectivity and enantioselectivity in palladium-catalyzed allylation of benzofuranones with 1,2-disubstituted allylic carbonates

scientific article published on 01 May 2014

Ligand-enabled multiple absolute stereocontrol in metal-catalysed cycloaddition for construction of contiguous all-carbon quaternary stereocentres.

scientific article published on 24 November 2013

Mannich-type allylic C-H functionalization of enol silyl ethers under photoredox-thiol hybrid catalysis

scientific article published on 05 October 2020

Meerwein-Ponndorf-Verley alkynylation of aldehydes: essential modification of aluminium alkoxides for rate acceleration and asymmetric synthesis.

scientific article published on 7 October 2004

Molecular Design, Synthesis, and Asymmetric Catalysis of a Hexacoordinated Chiral Phosphate Ion.

scientific article published in February 2018

N-Sulfonyl α-imino ester-derived chiral oxaziridines: catalytic asymmetric synthesis and application as a modular chiral organic oxidant

scientific article

N-spiro chiral quaternary ammonium bromide catalyzed diastereo- and enantioselective conjugate addition of nitroalkanes to cyclic alpha,beta-unsaturated ketones under phase-transfer conditions

scientific article published on 01 November 2005

New, improved procedure for the synthesis of structurally diverse N-spiro C2-symmetric chiral quaternary ammonium bromides.

scientific article published in May 2003

Nitroolefins as a nucleophilic component for highly stereoselective aza Henry reaction under the catalysis of chiral ammonium betaines

scientific article published on 01 June 2012

Origin of High Regio-, Diastereo-, and Enantioselectivities in 1,6-Addition of Azlactones to Dienyl N-Acylpyrroles: A Computational Study

scientific article published on 20 December 2016

Photoredox ketone catalysis for the direct C-H imidation and acyloxylation of arenes.

scientific article published on 5 June 2017

Practical asymmetric synthesis of vicinal diamines through the catalytic highly enantioselective alkylation of glycine amide derivatives.

scientific article published in January 2003

Practical stereoselective synthesis of beta-branched alpha-amino acids through efficient kinetic resolution in the phase-transfer-catalyzed asymmetric alkylations

scientific article published on 01 September 2007

Production at the Curie level of no-carrier-added 6-18F-fluoro-L-dopa.

scientific article published on 8 May 2013

Recent advances in asymmetric phase-transfer catalysis.

scientific article published on January 2007

Redox-regulated divergence in photocatalytic addition of α-nitro alkyl radicals to styrenes

scientific article published on 12 August 2020

Site-Selective Conjugate Addition Through Catalytic Generation of Ion-Pairing Intermediates.

scientific article published on 12 August 2015

Synergistic Catalysis of Ionic Brønsted Acid and Photosensitizer for a Redox Neutral Asymmetric α-Coupling of N-Arylaminomethanes with Aldimines

scientific article published on 11 October 2015

Unique site-selectivity control in asymmetric Michael addition of azlactone to alkenyl dienyl ketones enabled by P-spiro chiral iminophosphorane catalysis

scientific article published on 4 May 2017

Unique synthetic utility of BF(3).OEt(2) in the highly diastereoselective reduction of hydroxy carbonyl and dicarbonyl substrates

scientific article published on 01 July 2000

Unveiling Latent Photoreactivity of Imines

scientific article published on 23 January 2020

Urea as a Redox-Active Directing Group under Asymmetric Photocatalysis of Iridium-Chiral Borate Ion Pairs

scientific article published on 05 November 2020

Vinylogy in nitronates: utilization of α-aryl conjugated nitroolefins as a nucleophile for a highly stereoselective aza-Henry reaction

scientific article published on 01 March 2015

List of works by Takashi Ooi

A femtomolar-range suicide germination stimulant for the parasitic plant Striga hermonthica

Asymmetric induction in the Neber rearrangement of simple ketoxime sulfonates under phase-transfer conditions: experimental evidence for the participation of an anionic pathway.

Asymmetric organocatalysis of structurally well-defined chiral quaternary ammonium fluorides

Asymmetric strecker reaction of aldimines using aqueous potassium cyanide by phase-transfer catalysis of chiral quaternary ammonium salts with a tetranaphthyl backbone.

Asymmetric substitution at the tetrasubstituted chiral carbon: catalytic ring-opening alkylation of racemic 2,2-disubstituted aziridines with 3-substituted oxindoles.

Asymmetric synthesis of functionalized aza-cyclic amino acids with quaternary stereocenters by a phase-transfer-catalyzed alkylation strategy

Base-catalyzed direct aldolization of α-alkyl-α-hydroxy trialkyl phosphonoacetates.

Carbene transfer from triazolylidene gold complexes as a potent strategy for inducing high catalytic activity

Catalyst-Directed Guidance of Sulfur-Substituted Enediolates to Stereoselective Carbon-Carbon Bond Formation with Aldehydes

Catalyst-Enabled Site-divergent Stereoselective Michael Reactions: Overriding Intrinsic Reactivity of Enynyl Carbonyl Acceptors

Catalytic Asymmetric Oxidation of N-Sulfonyl Imines with Hydrogen Peroxide–Trichloroacetonitrile System ⬇️

Catalytic asymmetric Mannich-type reactions of α-cyano α-sulfonyl carbanions

Catalytic asymmetric direct Henry reaction of ynals: short syntheses of (2S,3R)-(+)-xestoaminol C and (-)-codonopsinines

Catalytic asymmetric protonation of alpha-amino acid-derived ketene disilyl acetals using P-spiro diaminodioxaphosphonium barfates as chiral proton

Catalytic asymmetric rearrangement of alpha,alpha-disubstituted alpha-siloxy aldehydes to optically active acyloins using axially chiral organoaluminum Lewis acids

Catalytic asymmetric ring openings of meso and terminal aziridines with halides mediated by chiral 1,2,3-triazolium silicates

Catalytic asymmetric synthesis of a nitrogen analogue of dialkyl tartrate by direct mannich reaction under phase-transfer conditions

Cationic Organic Catalysts or Ligands in Concert with Metal Catalysts

Chemistry. Heat and light switch a chiral catalyst and its products

Chiral 1,2,3-triazoliums as new cationic organic catalysts with anion-recognition ability: application to asymmetric alkylation of oxindoles

Chiral ammonium betaine-catalyzed highly stereoselective aza-henry reaction of α-aryl nitromethanes with aromatic N-Boc imines.

Chiral ammonium betaines as ionic nucleophilic catalysts

Chiral ammonium betaines: a bifunctional organic base catalyst for asymmetric Mannich-type reaction of alpha-nitrocarboxylates.

Chiral arylaminophosphonium barfates as a new class of charged brønsted acid for the enantioselective activation of nonionic Lewis bases

Chiral organic ion pair catalysts assembled through a hydrogen-bonding network.

Chiral tetraaminophosphonium salt-mediated asymmetric direct Henry reaction.

Complete diastereodivergence in asymmetric 1,6-addition reactions enabled by minimal modification of a chiral catalyst.

Complete switch of migratory aptitude in aluminum-catalyzed 1,2-rearrangement of differently alpha,alpha-disubstituted alpha-siloxy aldehydes

Construction of enantiomerically enriched tertiary alpha-hydroxycarboxylic acid derivatives by phase-transfer-catalyzed asymmetric alkylation of diaryloxazolidin-2,4-diones

Controlled assembly of chiral tetraaminophosphonium aryloxide-arylhydroxide(s) in solution

Correction to "Generation of Chiral Phosphonium Dialkyl Phosphite as a Highly Reactive P-Nucleophile: Application to Asymmetric Hydrophosphonylation of Aldehydes".

Design of N-spiro C2-symmetric chiral quaternary ammonium bromides as novel chiral phase-transfer catalysts: synthesis and application to practical asymmetric synthesis of alpha-amino acids.

Design of chiral organocatalysts for practical asymmetric synthesis of amino acid derivatives

Design of new chiral phase-transfer catalysts with dual functions for highly enantioselective epoxidation of alpha,beta-unsaturated ketones.

Designer chiral quaternary ammonium bifluorides as an efficient catalyst for asymmetric nitroaldol reaction of silyl nitronates with aromatic aldehydes.

Determination of the absolute configuration of compounds bearing chiral quaternary carbon centers using the crystalline sponge method

Development of highly diastereo- and enantioselective direct asymmetric aldol reaction of a glycinate Schiff base with aldehydes catalyzed by chiral quaternary ammonium salts.

Diastereo- and enantioselective phase-transfer alkylation of 3-substituted oxindoles with racemic secondary alkyl halides.

Direct allylic C-H alkylation of enol silyl ethers enabled by photoredox-Brønsted base hybrid catalysis.

Distinct advantage of the in situ generation of quaternary ammonium fluorides under phase-transfer conditions toward catalytic asymmetric synthesis

Dramatic rate enhancement of asymmetric phase-transfer-catalyzed alkylations

Enantioselective amino acid synthesis by chiral phase-transfer catalysis.

Enantioselective formal α-allylation of nitroalkanes through a chiral iminophosphorane-catalyzed Michael reaction-Julia-Kocienski olefination sequence

Enantioselective protonation of α-hetero carboxylic acid-derived ketene disilyl acetals under chiral ionic Brønsted acid catalysis.

Enantioselective reductive multicomponent coupling reactions between isatins and aldehydes.

Esterification of carboxylic acids catalyzed by in situ generated tetraalkylammonium fluorides

Exploiting the Modularity of Ion-Paired Chiral Ligands for Palladium-Catalyzed Enantioselective Allylation of Benzofuran-2(3H)-ones ⬇️

Generation of chiral phosphonium dialkyl phosphite as a highly reactive P-nucleophile: application to asymmetric hydrophosphonylation of aldehydes

Highly E-Selective and Enantioselective Michael Addition to Electron-Deficient Internal Alkynes Under Chiral Iminophosphorane Catalysis.

Highly diastereo- and enantioselective formal conjugate addition of nitroalkanes to nitroalkenes by chiral ammonium bifluoride catalysis

Highly enantioselective construction of quaternary stereocenters on beta-keto esters by phase-transfer catalytic asymmetric alkylation and Michael reaction

Highly enantioselective michael addition of silyl nitronates to alpha,beta-unsaturated aldehydes catalyzed by designer chiral ammonium bifluorides: efficient access to optically active gamma-nitro aldehydes and their enol silyl ethers.

Highly regio-, diastereo-, and enantioselective 1,6- and 1,8-additions of azlactones to di- and trienyl N-acylpyrroles

Highly stereoselective N-terminal functionalization of small peptides by chiral phase-transfer catalysis.

Importance of chiral phase-transfer catalysts with dual functions in obtaining high enantioselectivity in the Michael reaction of malonates and chalcone derivatives

Independence from the Sequence of Single-Electron Transfer of Photoredox Process in Redox-Neutral Asymmetric Bond-Forming Reaction

Inserting Nitrogen: An Effective Concept To Create Nonplanar and Stimuli-Responsive Perylene Bisimide Analogues

Ion-paired chiral ligands for asymmetric palladium catalysis

Ionic nucleophilic catalysis of chiral ammonium betaines for highly stereoselective aldol reaction from oxindole-derived vinylic carbonates

Ligand-controlled E/Z selectivity and enantioselectivity in palladium-catalyzed allylation of benzofuranones with 1,2-disubstituted allylic carbonates

Ligand-enabled multiple absolute stereocontrol in metal-catalysed cycloaddition for construction of contiguous all-carbon quaternary stereocentres.

Mannich-type allylic C-H functionalization of enol silyl ethers under photoredox-thiol hybrid catalysis

Meerwein-Ponndorf-Verley alkynylation of aldehydes: essential modification of aluminium alkoxides for rate acceleration and asymmetric synthesis.

Molecular Design, Synthesis, and Asymmetric Catalysis of a Hexacoordinated Chiral Phosphate Ion.

N-Sulfonyl α-imino ester-derived chiral oxaziridines: catalytic asymmetric synthesis and application as a modular chiral organic oxidant

N-spiro chiral quaternary ammonium bromide catalyzed diastereo- and enantioselective conjugate addition of nitroalkanes to cyclic alpha,beta-unsaturated ketones under phase-transfer conditions

New, improved procedure for the synthesis of structurally diverse N-spiro C2-symmetric chiral quaternary ammonium bromides.

Nitroolefins as a nucleophilic component for highly stereoselective aza Henry reaction under the catalysis of chiral ammonium betaines

Origin of High Regio-, Diastereo-, and Enantioselectivities in 1,6-Addition of Azlactones to Dienyl N-Acylpyrroles: A Computational Study

Photoredox ketone catalysis for the direct C-H imidation and acyloxylation of arenes.

Practical asymmetric synthesis of vicinal diamines through the catalytic highly enantioselective alkylation of glycine amide derivatives.

Practical stereoselective synthesis of beta-branched alpha-amino acids through efficient kinetic resolution in the phase-transfer-catalyzed asymmetric alkylations

Production at the Curie level of no-carrier-added 6-18F-fluoro-L-dopa.

Recent advances in asymmetric phase-transfer catalysis.

Redox-regulated divergence in photocatalytic addition of α-nitro alkyl radicals to styrenes

Site-Selective Conjugate Addition Through Catalytic Generation of Ion-Pairing Intermediates.

Synergistic Catalysis of Ionic Brønsted Acid and Photosensitizer for a Redox Neutral Asymmetric α-Coupling of N-Arylaminomethanes with Aldimines

Unique site-selectivity control in asymmetric Michael addition of azlactone to alkenyl dienyl ketones enabled by P-spiro chiral iminophosphorane catalysis

Unique synthetic utility of BF(3).OEt(2) in the highly diastereoselective reduction of hydroxy carbonyl and dicarbonyl substrates