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Research Output 1985 2019

  • 4331 Citations
  • 41 h-Index
  • 163 Article
  • 2 Review article
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Michael Addition of 2,2-Difluoroketene Silyl Acetal. Preparation of 4,4-Difluoroglutamic Acid and 5,5-Difluorolysine.

Kitagawa, O., Hashimoto, A., Kobayashi, Y. & Taguchi, T., 1990 Aug 10, In : Chem. Lett.. p. 1307-1310

Research output: Contribution to journalArticle

12 Citations (Scopus)

NaH-mediated iodoaziridination reaction of N-allylic tosylamides

Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 Dec 1, In : Tetrahedron Letters. 38, 48, p. 8371-8374 4 p.

Research output: Contribution to journalArticle

Derivatives
12 Citations (Scopus)

NaH-mediated Iodoaziridination Reaction of N-Allylic Tosylamides.

Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 Nov 15, In : Tetrahedron Lett. 38, p. 8371-8374

Research output: Contribution to journalArticle

2 Citations (Scopus)

N−C Axially Chiral Anilines: Electronic Effect on Barrier to Rotation and A Remote Proton Brake

Iwasaki, Y., Morisawa, R., Yokojima, S., Hasegawa, H., Roussel, C., Vanthuyne, N., Caytan, E. & Kitagawa, O., 2018 Mar 20, In : Chemistry - A European Journal. 24, 17, p. 4453-4458 6 p.

Research output: Contribution to journalArticle

Aniline Compounds
Aniline
Brakes
Protons
Design for testability
1 Citation (Scopus)

N-C Axially Chiral Compounds with an ortho-Fluoro Substituent and Steric Discrimination between Hydrogen and Fluorine Atoms Based on a Diastereoselective Model Reaction

Iida, A., Matsuoka, M., Hasegawa, H., Vanthuyne, N., Farran, D., Roussel, C. & Kitagawa, O., 2019 Mar 15, In : Journal of Organic Chemistry. 84, 6, p. 3169-3175 7 p.

Research output: Contribution to journalArticle

Fluorine
Hydrogen
Atoms
Bearings (structural)
Allylation
8 Citations (Scopus)

Notable structural property of 2,4,6-Tri- tert -butylanilide enolates: Interconversion between the rotamers and their reactivity

Ohnishi, Y., Sakai, M., Nakao, S. & Kitagawa, O., 2011 Jun 3, In : Organic Letters. 13, 11, p. 2840-2843 4 p.

Research output: Contribution to journalArticle

Anilides
Lithium
Structural properties
reactivity
lithium
8 Citations (Scopus)

Notable Structural Property of 2,4,6-Tri-tert-butylanilide Enolates: Interconversion between the Rotamers and Their Reactivity

Ohnishi, Y., Sakai, M., Nakao, S. & Kitagawa, O., 2011 May 20, In : Organic Letters. 13, p. 2840-2843

Research output: Contribution to journalArticle

122 Citations (Scopus)

Optically Active Axially Chiral Anilide and Maleimide Derivatives as New Chiral Reagents: Synthesis and Application to Asymmetric Diels-Alder Reaction

Kitagawa, O., Izawa, H., Sato, K., Dobashi, A., Taguchi, T. & Shiro, M., 1998 Apr 17, In : Journal of Organic Chemistry. 63, 8, p. 2634-2640 7 p.

Research output: Contribution to journalArticle

Anilides
Lewis Acids
Iodine
Lactic Acid
Derivatives
122 Citations (Scopus)

Optically Active Axially Chiral Anilide and Maleimide Derivatives as New Chiral Reagents: Synthesis and Application to Asymmetric Diels-Alder Reaction.

Kitagawa, O., Izawa, H., Sato, K., Dobashi, A. & Taguchi, T., 1998 Mar 15, In : J. Org. Chem.. 63, p. 2634-2640

Research output: Contribution to journalArticle

6 Citations (Scopus)

Possible Case of Halogen Bond-Driven Self-Disproportionation of Enantiomers (SDE) via Achiral Chromatography

Terada, S., Hirai, M., Honzawa, A., Kitagawa, O., Kamizela, A., Wzorek, A. & Soloshonok, V. A., 2017 Oct 17, In : Chemistry - A European Journal. 23, 58, p. 14631-14638 8 p.

Research output: Contribution to journalArticle

Halogens
Enantiomers
Chromatography
Chirality
Hydrogen bonds
16 Citations (Scopus)

Radical [3+2]-cycloaddition reaction with alkenes using dimethyl 2-(iodomethyl)cyclopropane-1,1-dicarboxylate as a new homoallyl radical precursor

Kitagawa, O., Fujiwara, H. & Taguchi, T., 2001 Mar 11, In : Tetrahedron Letters. 42, 11, p. 2165-2167 3 p.

Research output: Contribution to journalArticle

Cyclopentanes
Cycloaddition
Alkenes
Iodine
Derivatives

Radical [3+2] Cycloaddition Reaction with Alkenes using Dimethyl 2-Iodomethylcyclopropane-1,1-dicarboxylate as a New Homoallyl Radical Precursor.

Kitagawa, O., Fujiwara, H. & Taguchi, T., 2001 Mar 31, In : Tetrahedron Lett.. 42, p. 2165-2167

Research output: Contribution to journalArticle

24 Citations (Scopus)

Radical [3 + 2] cycloaddition reaction with various alkenes using iodomethylcyclopropane derivatives as new homoallyl radical precursors

Kitagawa, O., Yamada, Y., Fujiwara, H. & Taguchi, T., 2002 Feb 8, In : Journal of Organic Chemistry. 67, 3, p. 922-927 6 p.

Research output: Contribution to journalArticle

Cycloaddition
Alkenes
Derivatives
Cyclopentanes
Iodine
24 Citations (Scopus)

Radical [3+2] Cycloaddition Reaction with Various Alkenes Using Iodomethylcyclopropane Derivatives as New Homoallyl Radical Precursors.

Kitagawa, O., Yamada, Y., Fujiwara, H. & Taguchi, T., 2002 Jan 30, In : J. Org. Chem. 67, p. 922-927

Research output: Contribution to journalArticle

21 Citations (Scopus)
cyclopropane
octanes
dienes
Iodine
cascades
21 Citations (Scopus)

Regio-contorolled Iodoaminocyclization Reaction of an Ambident Nucleophile Mediated by LiAl(Ot-Bu)4.

Kitagawa, O., Fujita, M. & Taguchi, T., 1997 Feb 1, In : Tetrahedron Lett. 38, p. 615-618

Research output: Contribution to journalArticle

54 Citations (Scopus)

Regiocontrolled Iodoaminocyclization Reaction of an Ambident Nucleophile Mediated by Basic Metallic Reagent

Fujita, M., Kitagawa, O., Suzuki, T. & Taguchi, T., 1997, In : Journal of Organic Chemistry. 62, 21, p. 7330-7335 6 p.

Research output: Contribution to journalArticle

Nucleophiles
Cyclization
Carbamates
Urea
Amides
54 Citations (Scopus)

Regiocontrolled Iodoaminocyclization Reaction of an Ambident Nucleophile Mediated by Basic Metallic Reagent.

Fujita, M., Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 Oct 15, In : J. Org. Chem.. 62, p. 7330-7335

Research output: Contribution to journalArticle

30 Citations (Scopus)

Regio-controlled iodoaminocyclization reaction of an ambident nucleophile mediated by LiAl(Ot-Bu)4

Kitagawa, O., Fujita, M., Li, H. & Taguchi, T., 1997 Jan 27, In : Tetrahedron Letters. 38, 4, p. 615-618 4 p.

Research output: Contribution to journalArticle

Nucleophiles
Carbamates
Cyclization
Amides
Iodine
7 Citations (Scopus)

Relationship between rotational barriers and structures in N-C axially chiral 3,4-dihydroquinolin-2-one and 3,4-dihydrobenzoquinolin-2-one

Suzuki, Y., Takahashi, I., Dobashi, Y., Hasegawa, H., Roussel, C. & Kitagawa, O., 2015 Jan 1, In : Tetrahedron Letters. 56, 1, p. 132-135 4 p.

Research output: Contribution to journalArticle

Ground state
Crystal structure
Nuclear magnetic resonance
X rays
3,4-dihydroquinolin-2-one

Reversible Interconversion between Rotational Isomers of 2,4,6-Tri-tert-butylanilides

Tsukagoshi, S., Yusuke, Y., Ohnishi, O. & Kitagawa, O., 2012 Oct 30, In : Default journal.

Research output: Contribution to journalArticle

Rotational isomerism in 2,4,6-tri-tert-butylanilides

Ototake, N., Takahashi, I., Tsukagoshi, S., Maeda, T. & Kitagawa, O., 2013 Jan 21, In : Tetrahedron. 69, 3, p. 1013-1016 4 p.

Research output: Contribution to journalArticle

Anilides
Isomerization
Hydrogen bonds
Heating
2,4,6-tri-tert-butylanilide
39 Citations (Scopus)

Self-disproportionation of enantiomers of non-racemic chiral amine derivatives through achiral chromatography

Nakamura, T., Tateishi, K., Tsukagoshi, S., Hashimoto, S., Watanabe, S., Soloshonok, V. A., Aceña, J. L. & Kitagawa, O., 2012 May 27, In : Tetrahedron. 68, 21, p. 4013-4017 5 p.

Research output: Contribution to journalArticle

Enantiomers
Chromatography
Amines
Derivatives
Acetamides
107 Citations (Scopus)

Self-disproportionation of enantiomers via achiral chromatography: A warning and an extra dimension in optical purifications

Soloshonok, V. A., Roussel, C., Kitagawa, O. & Sorochinsky, A. E., 2012 Jun 7, In : Chemical Society Reviews. 41, 11, p. 4180-4188 9 p.

Research output: Contribution to journalArticle

Enantiomers
Chromatography
Purification
Chirality
Bearings (structural)
107 Citations (Scopus)

Self-disproportionation of enantiomers via achiral chromatography: a warning and an extra dimension in optical purifications

Soloshono, V., Roussel, C., Kitagawa, O., Alex, A. & Sorochinsky, E., 2012 Jun 2, In : Chem. Soc. Rev.. 41, p. 4180-4188

Research output: Contribution to journalArticle

1 Citation (Scopus)

Specific reactivity of 2,4,6-tri-tert-butylanilide anions and its application to benzylation reagent

Yamada, T., Tsukagoshi, S. & Kitagawa, O., 2017 Jan 25, In : Tetrahedron Letters. 58, 4, p. 317-320 4 p.

Research output: Contribution to journalArticle

Anilides
Imidoesters
Anions
Alkylation
Ethers
10 Citations (Scopus)

Stereoselective Iodine Atom Transfer [3 + 2] Cycloaddition Reaction with Alkenes Using Unsymmetrical Allylated Active Methine Radicals

Kitagawa, O., Miyaji, S., Sakuma, C. & Taguchi, T., 2004 Apr 2, In : Journal of Organic Chemistry. 69, 7, p. 2607-2610 4 p.

Research output: Contribution to journalArticle

Cyclopentanes
Stereoselectivity
Cycloaddition
Alkenes
Iodine
47 Citations (Scopus)

Stereoselective synthesis of an optically active axially chiral lactam and its reaction with some electrophiles

Fujita, M., Kitagawa, O., Izawa, H., Dobashi, A., Fukaya, H. & Taguchi, T., 1999 Mar 5, In : Tetrahedron Letters. 40, 10, p. 1949-1952 4 p.

Research output: Contribution to journalArticle

Lactams
Chirality
2-pyrrolidone
47 Citations (Scopus)

Stereoselective Synthesis of an Optically Active Axially Chiral Lactam and Its Reaction with Some Electrophiles.

Fujita, M., Kitagawa, O., Izawa, H., Dobashi, A., Fukaya, H. & Taguchi, T., 1999 Feb 1, In : Tetrahedron Lett.. 40, p. 1949-1952

Research output: Contribution to journalArticle

41 Citations (Scopus)

Stereoselective synthesis of diastereomeric atropisomeric lactam with various ring sizes and their structural characterization

Kitagawa, O., Fujita, M., Kohriyama, M., Hasegawa, H. & Taguchi, T., 2000 Oct 28, In : Tetrahedron Letters. 41, 44, p. 8539-8544 6 p.

Research output: Contribution to journalArticle

Lactams
Kinetics
41 Citations (Scopus)

Stereoselective Synthesis of Diastereomeric Atropisomeric Lactam with Various Ring Sizes and Their Structural Characterization.

Kitagawa, O., Fujita, M., Kohriyama, M., Hasegawa, H. & Taguchi, T., 2000 Nov 30, In : Tetrahedron Lett.. 41, p. 8539-8544

Research output: Contribution to journalArticle

Stereoselective synthesis of separable amide rotamers using p-allyl-Pd catalyst and their thermodynamic behavior

Ototake, N., Taguchi, T. & Kitagawa, O., 2008 Aug 1, In : Tetrahedron Lett.. 49, p. 5458-5460

Research output: Contribution to journalArticle

8 Citations (Scopus)

Stereoselective synthesis of separable amide rotamers using π-allyl-Pd catalyst and their thermodynamic behavior

Ototake, N., Taguchi, T. & Kitagawa, O., 2008 Sep 15, In : Tetrahedron Letters. 49, 38, p. 5458-5460 3 p.

Research output: Contribution to journalArticle

Allylation
Amides
Thermodynamics
Catalysts
Anilides

Structual Analysis of -Turn Mimics Containing a Substituted 6-Aminocaproic Acid Linker.

Kitagawa, O., V, D., Velde, E., Dutta, D., Morton, M., Takusagawa, F. & Aube, J., 1995 Oct 1, In : J. Am. Chem. Soc.. 117, p. 5169-5178

Research output: Contribution to journalArticle

41 Citations (Scopus)

Structural analysis of β-turn mimics containing a substituted 6-aminocaproic acid linker

Kitagawa, O., Kitagawa, O., Dutta, D., Morton, M., Takusagawa, F. & Aube, J., 1995, In : Journal of the American Chemical Society. 117, 19, p. 5169-5178 10 p.

Research output: Contribution to journalArticle

Aminocaproic Acid
Structural analysis
Stereochemistry
Stereoisomerism
Acids

Studies on Organic Fluorine Compounds. XLV. Synthesis and Regioselective Substitution Reaction of 3-Trifluoromethylfuran

KAWADA, KOSUKE., Kitagawa, O. & KOBAYASHI, YOSHIRO., 1985, In : Chemical and Pharmaceutical Bulletin. 33, 9, p. 3670-3674

Research output: Contribution to journalArticle

Fluorine Compounds
Substitution reactions
n-butyllithium
20 Citations (Scopus)

Studies on Organic Fluorine Compounds. XLVII. Synthesis of Trifluoromethylated Sugars through the Aldol Reaction of 2-Trimethylsilyloxy-4-trifluoromethylfuran

SAWADA, KOSUKE., Kitagawa, O., TAGUCHI, TAKEO., HANZAWA, YUJI., KOBAYASHI, YOSHIRO. & IITAKA, YOICHI., 1985, In : Chemical and Pharmaceutical Bulletin. 33, 10, p. 4216-4222

Research output: Contribution to journalArticle

Fluorine Compounds
Sugars
Lewis Acids
X ray analysis
Aldehydes
10 Citations (Scopus)

Studies on rotational barriers of N-C axially chiral compounds: Increase in the rotational barrier by aromatization

Suzumura, N., Kageyama, M., Kamimura, D., Inagaki, T., Dobashi, Y., Hasegawa, H., Fukaya, H. & Kitagawa, O., 2012 Aug 15, In : Tetrahedron Letters. 53, 33, p. 4332-4336 5 p.

Research output: Contribution to journalArticle

Aromatization
Discrete Fourier transforms
Nitrogen
10 Citations (Scopus)

Studies on rotational barriers of N-C axially chiral compounds: increase in the rotational barrier by aromatization

Suzumura, N., Kageyama, M., Kamimura, D., Inagak, T., Dobashi, Y., Hasegawa, H., Fukaya, H. & Kitagawa, O., 2012 Aug 1, In : Tetrahedron Lett. 53, p. 4332-4336

Research output: Contribution to journalArticle

Study on Rotational Barrier of N-C Axially Chiral Compounds: Remarkable Increase in the ROtational Barrier by Aromatization

Suzumura, N., Kageyama, M., Dobashi, Y. & Kitagawa, O., 2012 May 17, In : Default journal.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Synthesis and Regioselective Substitution Reaction of 3-Trifluoromethylfuran.

Kawada, K., Kitagawa, O. & Taguchi, T., 1985 Sep 1, In : Chem. Pharm. Bull.. 33, p. 3670-3674

Research output: Contribution to journalArticle

102 Citations (Scopus)

Synthesis of 2,2-difluoroesters by iododifluoroacetate-copper with organic halides

Taguchi, T., Kitagawa, O., Morikawa, T., Nishiwaki, T., Uehara, H., Endo, H. & Kobayashi, Y., 1986, In : Tetrahedron Letters. 27, 50, p. 6103-6106 4 p.

Research output: Contribution to journalArticle

Iodides
Copper
102 Citations (Scopus)

Synthesis of 2,2-Difluoroesters by Iododifluoroacetate-Copper with Organic Halides.

Taguchi, T., Kitagawa, O., Morikawa, T., Nishiwaki, T., Uehara, H., Endo, H. & Kobayashi, Y., 1986 Nov 10, In : Tetrahedron Lett.. 27, p. 6103-6106

Research output: Contribution to journalArticle

106 Citations (Scopus)

Synthesis of 3,3-difluoro-2-azetidinones and 2,3-dideoxy-2,2-difluoro-3-amino-sugars through the reformatsky reaction of difluoroacetate with imine

Taguchi, T., Kitagawa, O., Suda, Y., Ohkawa, S., Hashimoto, A., Iitaka, Y. & Kobayashi, Y., 1988, In : Tetrahedron Letters. 29, 41, p. 5291-5294 4 p.

Research output: Contribution to journalArticle

Amino Sugars
Imines
Acetals
Derivatives
Esters

Synthesis of 3,3-Difluoro-2-Azetidinones and 2,3-Dideoxy-2,2-difluoro-3-aminosugars through the Reformatsky Reaction of Difluoroacetate with Imine.

Taguchi, T., Kitagawa, O., Suda, Y., Ohkawa, S., Hashimoto, A., Iitaka, Y. & Kobayashi, Y., 1988 Oct 10, In : Tetrahedron Lett.. 29, p. 5291-5294

Research output: Contribution to journalArticle

Synthesis of -Difluorocarboxylic Acid Derivatives through the Claisen Rearrangement of 1,1-Difluoro-1-alkane-3-ols.

Taguchi, T., Morikawa, T., Kitagawa, O., Mishima, T. & Kobayashi, Y., 1985 Nov 1, In : Chem. Pharm. Bull.. 33, p. 5137-5140

Research output: Contribution to journalArticle

52 Citations (Scopus)

Synthesis of optically active 5-substituted-2-pyrrolidinone derivatives having atropisomeric structure and 3,5-cis-selective reaction of their enolates with electrophiles

Fujita, M., Kitagawa, O., Yamada, Y., Izawa, H., Hasegawa, H. & Taguchi, T., 2000 Feb 25, In : Journal of Organic Chemistry. 65, 4, p. 1108-1114 7 p.

Research output: Contribution to journalArticle

Derivatives
Lactams
2-pyrrolidone
aniline

Synthesis of Optically Active Aldol Derivatives through Chilarity Transfer Type 1,2-Wittig Rearrangement of -Alkoxycarboxamides.

Kitagawa, O., Momose, S. & Yamada, Y., 2001 Jul 1, In : Tetrahedron Lett.. 42, p. 4865-4868

Research output: Contribution to journalArticle