北川 理

研究成果

年別の研究成果 1985 1995 1997 1998 1999 2012 2022

• 169 Article
• 4 Review article
• 2 Comment/debate

年別の研究成果

年別の研究成果

検索結果

• Ionic Iodocarbocyclization Reactions of 4-Alkenyl- and 4-Alkynylmalonate Derivatives

  Kitagawa, O., Inoue, T., Hirano, K. & Taguchi, T., 1993 1月 1, In: Journal of Organic Chemistry. 58, 11, p. 3106-3112 7 p.

  研究成果: Article › 査読

  • Cyclopentane 100%
  • Cyclization Reaction 61%
  • Spiro Compound 58%
  • Lactone 39%
  • Regioselectivity 38%
  33 被引用数 (Scopus)

• Ionic Iodocarbocyclization Reactions of 4-Alkenyl- and 4-Alkynylmalonate Derivatives.

  Kitagawa, O., Inoue, T., Hirano, K. & Taguchi, T., 1993 3月 1, In: J. Org. Chem.. 58, p. 3106-3112

  研究成果: Article › 査読

  35 被引用数 (Scopus)

• 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 8月 10, In: Chem. Lett.. p. 1307-1310

  研究成果: Article › 査読

• NaH-mediated iodoaziridination reaction of N-allylic tosylamides

  Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 12月 1, In: Tetrahedron Letters. 38, 48, p. 8371-8374 4 p.

  研究成果: Article › 査読

  • Reaction Yield 100%
  11 被引用数 (Scopus)

• NaH-mediated Iodoaziridination Reaction of N-Allylic Tosylamides.

  Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 11月 15, In: Tetrahedron Lett. 38, p. 8371-8374

  研究成果: Article › 査読

  8 被引用数 (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 3月 15, In: Journal of Organic Chemistry. 84, 6, p. 3169-3175 7 p.

  研究成果: Article › 査読

  • Diastereoselectivity 100%
  • Hydrogen Atom 87%
  • Fluorine Atom 87%
  • Atropisomer 69%
  • Allylation 58%
  13 被引用数 (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 6月 3, In: Organic Letters. 13, 11, p. 2840-2843 4 p.

  研究成果: Article › 査読

  • Anilides 100%
  • Rotamer 64%
  • Lithium 60%
  • reactivity 55%
  • lithium 49%
  9 被引用数 (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 5月 20, In: Organic Letters. 13, p. 2840-2843

  研究成果: Article › 査読

  9 被引用数 (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 3月 20, In: Chemistry - A European Journal. 24, 17, p. 4453-4458 6 p.

  研究成果: Article › 査読

  • Aniline 100%
  • Rotational Barrier 81%
  • Protons 77%
  • Electrons 64%
  • Brakes 61%
  20 被引用数 (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 4月 17, In: Journal of Organic Chemistry. 63, 8, p. 2634-2640 7 p.

  研究成果: Article › 査読

  • Chiral Reagent 100%
  • Anilide 87%
  • Maleimide 77%
  • Diels-Alder Reaction 64%
  • Absolute Configuration 62%
  58 被引用数 (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 3月 15, In: J. Org. Chem.. 63, p. 2634-2640

  研究成果: Article › 査読

  40 被引用数 (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 10月 17, In: Chemistry - A European Journal. 23, 58, p. 14631-14638 8 p.

  研究成果: Article › 査読

  • Enantiomers 100%
  • Chromatography 77%
  • Halogen 50%
  • Enantiomer 44%
  • Chirality 44%
  15 被引用数 (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 3月 11, In: Tetrahedron Letters. 42, 11, p. 2165-2167 3 p.

  研究成果: Article › 査読

  • Cyclopentanes 100%
  • Cycloaddition Reaction 95%
  • cyclopropane 93%
  • Alkenes 89%
  • Iodine Atom 72%
  7 被引用数 (Scopus)

• 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 3月 31, In: Tetrahedron Lett.. 42, p. 2165-2167

  研究成果: Article › 査読

• 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 2月 8, In: Journal of Organic Chemistry. 67, 3, p. 922-927 6 p.

  研究成果: Article › 査読

  • Iodine Atom 100%
  • Cyclopentane 96%
  • Cyclopropane 85%
  • Cycloaddition 67%
  • Alkene 56%
  26 被引用数 (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 1月 30, In: J. Org. Chem. 67, p. 922-927

  研究成果: Article › 査読

  26 被引用数 (Scopus)

• Radical cascade reaction with 1,4-dienes and 1,4-enynes using 2-(iodomethyl)cyclopropane-1,1-dicarboxylate as a homoallyl radical precursor: One-step synthesis of bicyclo[3.3.0]octane derivatives

  Kitagawa, O., Yamada, Y., Sugawara, A. & Taguchi, T., 2002 3月 21, In: Organic Letters. 4, 6, p. 1011-1013 3 p.

  研究成果: Article › 査読

  • octane 100%
  • cyclopropane 98%
  • dienes 85%
  • octanes 77%
  • Iodine Atom 76%
  23 被引用数 (Scopus)

• Radical Cascade Reaction with 1,4-Dienes and 1,4-Enynes using 2-(Iodomethyl)cyclopropane-1,1-dicarboxylate as a Homoallyl Radical Precursor: One-step Synthesis of Bicyclo[3.3.0]octane Derivatives.

  Kitagawa, O., Yamada, Y., Sugawara, A. & Taguchi, T., 2002 3月 19, In: Org. Lett.. 4, p. 1011-1013

  研究成果: Article › 査読

  16 被引用数 (Scopus)

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

  Kitagawa, O., Fujita, M. & Taguchi, T., 1997 2月 1, In: Tetrahedron Lett. 38, p. 615-618

  研究成果: Article › 査読

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

  Fujita, M., Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 1月 1, In: Journal of Organic Chemistry. 62, 21, p. 7330-7335 6 p.

  研究成果: Article › 査読

  • Carbamate 100%
  • Nucleophile 85%
  • Urea 77%
  • Cyclization Reaction 36%
  • Amide 35%
  63 被引用数 (Scopus)

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

  Fujita, M., Kitagawa, O., Suzuki, T. & Taguchi, T., 1997 10月 15, In: J. Org. Chem.. 62, p. 7330-7335

  研究成果: Article › 査読

  63 被引用数 (Scopus)

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

  Kitagawa, O., Fujita, M., Li, H. & Taguchi, T., 1997 1月 27, In: Tetrahedron Letters. 38, 4, p. 615-618 4 p.

  研究成果: Article › 査読

  • Cyclization 100%
  • Carbamates 92%
  • Amides 78%
  • Iodine 69%
  • Carbamate 67%
  29 被引用数 (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 1月 1, In: Tetrahedron Letters. 56, 1, p. 132-135 4 p.

  研究成果: Article › 査読

  • Rotational Barrier 100%
  • Proton Magnetic Resonance Spectroscopy 91%
  • X-Rays 60%
  • 1H NMR Spectrum 35%
  • Ground State 31%
  10 被引用数 (Scopus)

• Relayed Proton Brake in N-Pyridyl-2-iso-propylaniline Derivative: Two Brakes with One Proton

  Furukawa, G., Shirai, T., Homma, Y., Caytan, E., Vanthuyne, N., Farran, D., Roussel, C. & Kitagawa, O., 2020 4月 3, In: Journal of Organic Chemistry. 85, 7, p. 5109-5113 5 p.

  研究成果: Article › 査読

  • Methanesulfonic Acid 100%
  • Nitrogen Atom 64%
  • Pyridine 55%
  • Proton 50%
  4 被引用数 (Scopus)

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

  Tsukagoshi, S., Yusuke, Y., Ohnishi, O. & Kitagawa, O., 2012 10月 30, In: Default journal.

  研究成果: Article › 査読

• Rotational Behavior of N-(5-Substituted-pyrimidin-2-yl)anilines: Relayed Electronic Effect in Two N-Ar Bond Rotations

  Homma, D., Taketani, S., Shirai, T., Caytan, E., Roussel, C., Elguero, J., Alkorta, I. & Kitagawa, O., 2022 6月 17, In: Journal of Organic Chemistry. 87, 12, p. 8118-8125 8 p.

  研究成果: Article › 査読

  • Bond Rotation 100%
  • Rotational Barrier 90%
  • Aniline 60%
  1 被引用数 (Scopus)

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

  Ototake, N., Takahashi, I., Tsukagoshi, S., Maeda, T. & Kitagawa, O., 2013 1月 21, In: Tetrahedron. 69, 3, p. 1013-1016 4 p.

  研究成果: Article › 査読

  • Anilides 100%
  • Isomerism 90%
  • Hydrogen Bonding 67%
  • Heating 59%
  • Anilide 36%
  1 被引用数 (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 5月 27, In: Tetrahedron. 68, 21, p. 4013-4017 5 p.

  研究成果: Article › 査読

  • Acetamides 100%
  • acetamide 76%
  • Amines 53%
  • Chromatography 50%
  • Enantiomer 39%
  58 被引用数 (Scopus)

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

  Soloshonok, V. A., Roussel, C., Kitagawa, O. & Sorochinskya, A. E., 2012 5月 15, In: Chemical Society Reviews. 41, 11, p. 4180-4188 9 p.

  研究成果: Article › 査読

  • Enantiomer 100%
  • Chromatography 99%
  • Dimension 96%
  • Purification 86%
  • Chirality 34%
  141 被引用数 (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 6月 2, In: Chem. Soc. Rev.. 41, p. 4180-4188

  研究成果: Article › 査読

  141 被引用数 (Scopus)

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

  Yamada, T., Tsukagoshi, S. & Kitagawa, O., 2017 1月 25, In: Tetrahedron Letters. 58, 4, p. 317-320 4 p.

  研究成果: Article › 査読

  • Anilides 100%
  • Imidoesters 73%
  • Benzylation 73%
  • Anilide 72%
  • Anions 59%
  1 被引用数 (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 4月 2, In: Journal of Organic Chemistry. 69, 7, p. 2607-2610 4 p.

  研究成果: Article › 査読

  • Iodine Atom 100%
  • Cyclopentane 96%
  • Stereoselectivity 73%
  • Cycloaddition 67%
  • Alkene 56%
  11 被引用数 (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 3月 5, In: Tetrahedron Letters. 40, 10, p. 1949-1952 4 p.

  研究成果: Article › 査読

  • 2-pyrrolidone 100%
  • Lactams 82%
  • Lactam 63%
  • Electrophile 57%
  • Chirality 54%
  49 被引用数 (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 2月 1, In: Tetrahedron Lett.. 40, p. 1949-1952

  研究成果: Article › 査読

  17 被引用数 (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 10月 28, In: Tetrahedron Letters. 41, 44, p. 8539-8544 6 p.

  研究成果: Article › 査読

  • Lactams 100%
  • Lactam 76%
  • Diastereomer 64%
  • Ring Formation 24%
  • Diastereoselectivity 23%
  29 被引用数 (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 11月 30, In: Tetrahedron Lett.. 41, p. 8539-8544

  研究成果: Article › 査読

  43 被引用数 (Scopus)

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

  Ototake, N., Taguchi, T. & Kitagawa, O., 2008 8月 1, In: Tetrahedron Lett.. 49, p. 5458-5460

  研究成果: Article › 査読

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

  Ototake, N., Taguchi, T. & Kitagawa, O., 2008 9月 15, In: Tetrahedron Letters. 49, 38, p. 5458-5460 3 p.

  研究成果: Article › 査読

  • Thermodynamics 100%
  • Amides 97%
  • Rotamer 95%
  • Anilides 73%
  • Amide 58%
  9 被引用数 (Scopus)

• 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 10月 1, In: J. Am. Chem. Soc.. 117, p. 5169-5178

  研究成果: Article › 査読

• Structural Analysis of β-Turn Mimics Containing a Substituted 6-Aminocaproic Acid Linker

  Takusagawa, F., Kitagawa, O., Velde, D. V., Dutta, D., Morton, M. & Aubé, J., 1995 5月, In: Journal of the American Chemical Society. 117, 19, p. 5169-5178 10 p.

  研究成果: Article › 査読

  • alanylglycine 100%
  • Aminocaproic Acid 85%
  • Stereoisomerism 80%
  • X Ray Crystallography 79%
  • Dipeptides 74%
  27 被引用数 (Scopus)

• 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

  研究成果: Article › 査読

  • n-butyllithium 100%
  • Fluorine Compounds 87%
  • Lithiation 50%
  • Electrophile 46%
  • Substitution Reaction 29%

• 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

  研究成果: Article › 査読

  • Fluorine Compounds 100%
  • 3-hydroxybutanal 96%
  • Aldol Condensation 60%
  • Aldol Reaction 59%
  • Sugars 51%
  7 被引用数 (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 8月 15, In: Tetrahedron Letters. 53, 33, p. 4332-4336 5 p.

  研究成果: Article › 査読

  • Density Functional Theory 100%
  • Rotational Barrier 72%
  • Aromatization 63%
  • Nitrogen 56%
  • Bond Rotation 40%
  17 被引用数 (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 8月 1, In: Tetrahedron Lett. 53, p. 4332-4336

  研究成果: Article › 査読

  17 被引用数 (Scopus)

• Studies on rotational stability of 2-aryl-3-(2-fluorophenyl)quinazolin-4-one derivatives

  Iida, A., Saito, K., Asada, N., Fujimoto, Y. & Kitagawa, O., 2021, In: Heterocycles. 103, 1

  研究成果: Article › 査読

  • 4-hydroxyquinazoline 100%
  • Rotational Barrier 68%
  • Density Functional Theory 46%
  • Transition State Structure 34%
  1 被引用数 (Scopus)

• 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 5月 17, In: Default journal.

  研究成果: Article › 査読

• Synthesis and Regioselective Substitution Reaction of 3-Trifluoromethylfuran.

  Kawada, K., Kitagawa, O. & Taguchi, T., 1985 9月 1, In: Chem. Pharm. Bull.. 33, p. 3670-3674

  研究成果: Article › 査読

  4 被引用数 (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.

  研究成果: Article › 査読

  • Organic Halide 100%
  • Iodides 97%
  • Aprotic Solvent 86%
  • Copper 76%
  • Iodide 60%
  70 被引用数 (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 11月 10, In: Tetrahedron Lett.. 27, p. 6103-6106

  研究成果: Article › 査読

  70 被引用数 (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.

  研究成果: Article › 査読

  • difluoroacetic acid 100%
  • 2-azetidinone 85%
  • Difluoroacetate 77%
  • Acetals 73%
  • Amino Sugars 67%
  27 被引用数 (Scopus)