Osamu Kitagawa

Article

(Methyl difluoroacetate)copper Reagent. Remarkable Solvent Effect on the 19F-NMR Spectrum, Stability and Reactivity.

Kitagawa, O., Taguchi, T. & Kobayashi, Y., 1989 3 10, ： : Chem. Lett.. p. 389-392

研究成果: Article

A comprehensive examination of the self-disproportionation of enantiomers (SDE) of chiral amides via achiral, laboratory-routine, gravity-driven column chromatography

Suzuki, Y., Han, J., Kitagawa, O., Aceña, J. L., Klika, K. D. & Soloshonok, V. A., 2015, ： : RSC Advances. 5, 4, p. 2988-2993 6 p.

研究成果: Article

Column chromatography

Enantiomers

Amides

Gravitation

Chromatography

A Facile -Iodination Reaction of Unsaturated Amides.

Kitagawa, O., Hanano, T., Inoue, T. & Taguchi, T., 1992 2 1, ： : Tetrahedron Lett.. 33, p. 2167-2170

研究成果: Article

23 引用 (Scopus)

A facile α-iodination reaction of unsaturated amides

Kitagawa, O., Hanano, T., Hirata, T., Inoue, T. & Taguchi, T., 1992 3 3, ： : Tetrahedron Letters. 33, 10, p. 1299-1302 4 p.

研究成果: Article

Amides

gamma-collidine

112 引用 (Scopus)

Aldol reaction of iododifluoroacetate-Zn and 2,2-difluoroketene silyl acetal

Kitagawa, O., Taguchi, T. & Kobayashi, Y., 1988, ： : Tetrahedron Letters. 29, 15, p. 1803-1806 4 p.

研究成果: Article

Acetals

Iodides

Galactose

Aldehydes

3-hydroxybutanal

112 引用 (Scopus)

Aldol Reaction of Iododifluoroacetate-Zn and 2,2-Difluoroketene Silyl Acetal.

Kitagawa, O., Taguchi, T. & Kobayashi, Y., 1988 4 10, ： : Tetrahedron Lett.. 29, p. 1803-1806

研究成果: Article

23 引用 (Scopus)

Alkaline metallic reagent-catalyzed hydrocarbocyclization reaction of various active methine compounds having an unactivated 4-alkynyl or allenyl group

Kitagawa, O., Suzuki, T., Fujiwara, H., Fujita, M. & Taguchi, T., 1999 6 11, ： : Tetrahedron Letters. 40, 24, p. 4585-4588 4 p.

研究成果: Article

Proton transfer

Derivatives

n-butyllithium

23 引用 (Scopus)

Alkaline Metallic Reagent-catalyzed Hydrocarbocyclization Reaction of Various Active Methine Compounds Having an Unactivated 4-Alkynyl or Allenyl Group.

Kitagawa, O., Suzuki, T., Fujiwara, H., Fujita, M. & Taguchi, T., 1999 6 20, ： : Tetrahedron Lett.. 40, p. 4585-4588

研究成果: Article

A Mild and Highly Chemoselective -Iodination of N-Allylic Carboxamides and Lactams.

Kitagawa, O., Kikuchi, N., Hanano, T., Aoki, K., Yamazaki, T., Okada, M. & Taguchi, T., 1995 8 1, ： : J. Org. Chem.. 60, p. 7161-7165

研究成果: Article

18 引用 (Scopus)

A mild and highly chemoselective α-iodination of N-allylic carboxamides and lactams

Kitagawa, O., Kikuchi, N., Hanano, T., Aoki, K., Yamazaki, T., Okada, M. & Taguchi, T., 1995, ： : The Journal of Organic Chemistry. 60, 22, p. 7161-7165 5 p.

研究成果: Article

Lactams

Amides

Stereoselectivity

Iodides

Iodine

13 引用 (Scopus)

A mild method for generation of p-methoxybenzyl cation through NIS-mediated activation of p-methoxybenzyl 4-pentenyl ether

Okada, M., Kitagawa, O., Fujita, M. & Taguchi, T., 1996 6 10, ： : Tetrahedron. 52, 24, p. 8135-8142 8 p.

研究成果: Article

Ether

Cations

Chemical activation

Ethers

Alcohols

13 引用 (Scopus)

A Mild Method for Generation of p-Methoxybenzyl Cation through NIS-mediated Activation of p-Methoxybenzyl 4-Pentenyl Ether.

Okada, M., Kitagawa, O., Fujita, M. & Taguchi, T., 1996 7 10, ： : Tetrahedron. 52, p. 8135-8142

研究成果: Article

71 引用 (Scopus)

An efficient synthesis of optically active axially chiral anilide and its application to iodine-mediated asymmetric Diels-Alder reaction

Kitagawa, O., Izawa, H., Taguchi, T. & Shiro, M., 1997 6 23, ： : Tetrahedron Letters. 38, 25, p. 4447-4450 4 p.

研究成果: Article

Anilides

Cyclopentanes

Iodine

Lactic Acid

isoprene

71 引用 (Scopus)

An Efficient Synthesis of Optically Active Axially Chiral Anilide and Its Application to Iodine-mediated Asymmetric Diels-Alder Reaction.

Kitagawa, O., Izawa, H., Taguchi, T. & Shiro, M., 1997 6 9, ： : Tetrahedron Lett.. 38, p. 4447-4450

研究成果: Article

Asymetric Synthesis of -Amino Acids through -Iodination of Chiral Unsaturated Carboxamides and Stereoselective Iodolactonization.

Kitagawa, O., Hanano, T., Kikuchi, N. & Taguchi, T., 1993 3 1, ： : Tetrahedron Lett.. 34, p. 2165-2168

研究成果: Article

32 引用 (Scopus)

Asymmetric synthesis of atropisomeric compounds with an N-C chiral axis

Takahashi, I., Suzuki, Y. & Kitagawa, O., 2014 1 1, ： : Organic Preparations and Procedures International. 46, 1, p. 1-23 23 p.

研究成果: Article

39 引用 (Scopus)

Asymmetric synthesis of α-amino acids through α-iodination of chiral unsaturated carboxamides and stereoselective iodolactonization

Kitagawa, O., Hanano, T., Kikuchi, N. & Taguchi, T., 1993 3 26, ： : Tetrahedron Letters. 34, 13, p. 2165-2168 4 p.

研究成果: Article

Iodides

Lactones

Amides

Amino Acids

pyrrolidine

Atom-transfer Reaction of Difluoroiodoacetate.

Kitagawa, O., Miura, A., Kobayashi, Y. & Taguchi, T., 1990 6 10, ： : Chem. Lett.. p. 1011-1014

研究成果: Article

44 引用 (Scopus)

Atropisomeric lactam chemistry: catalytic enantioselective synthesis, application to asymmetric enolate chemistry and synthesis of key intermediates for NET inhibitors

Takahashi, M., Tanabe, H., Nakamura, T., Kuribara, D., Yamazaki, T. & Kitagawa, O., 2010 1 2, ： : Tetrahedron. 66, 1, p. 288-296 9 p.

研究成果: Article

Lactams

Anilides

Silica Gel

Lithium

Purification

44 引用 (Scopus)

Atropisomeric lactam chemistry: catalytic enantioselective synthesis, application to asymmetric enolate chemistry and synthesis of key intermediates for NET inhibitors

Takahashi, M., Tanabe, H., Nakamura, T., Kuribara, D., Yamazaki, T. & Kitagawa, O., 2010 1 5, ： : Tetrahedron. 66, p. 288-296

研究成果: Article

9 引用 (Scopus)

Beckmann rearrangement of O-4-pentenyl oxime through N- bromosuccinimide-mediated activating process

Kitagawa, O., Fujita, M., Okada, M. & Taguchi, T., 1997 1, ： : Chemical and Pharmaceutical Bulletin. 45, 1, p. 32-35 4 p.

研究成果: Article

Bromosuccinimide

Oximes

Derivatives

9 引用 (Scopus)

Beckmann Rearrangement of O-4-Pentenyl Oxime through N-Bromosuccinimide-mediated Activating Process.

Kitagawa, O., Fujita, M., Okada, M. & Taguchi, T., 1997 1 20, ： : Chem. Pharm. Bull.. 45, p. 32-35

研究成果: Article

70 引用 (Scopus)

Carbocyclization reaction of active methine compounds with unactivated alkenyl or alkynyl groups mediated by TiCl₄-Et₃N

Kitagawa, O., Suzuki, T., Inoue, T., Watanabe, Y. & Taguchi, T., 1998 12 11, ： : Journal of Organic Chemistry. 63, 25, p. 9470-9475 6 p.

研究成果: Article

Derivatives

Alkynes

titanium tetrachloride

70 引用 (Scopus)

Carbocyclization Reaction of Active Methine Compounds with Unactivated Alkenyl or Alkynyl Groups mediated by TiCl4-Et3N.

Kitagawa, O., Suzuki, T., Inoue, T., Watanabe, Y. & Taguchi, T., 1998 11 6, ： : J. Org. Chem.. 63, p. 9470-9475

研究成果: Article

26 引用 (Scopus)

Carbocyclization reactions of terminally difluorinated alkenyl active methine compounds mediated by SnCl₄ and amine

Saito, A., Okada, M., Nakamura, Y., Kitagawa, O., Horikawa, H. & Taguchi, T., 2003 9 1, ： : Journal of Fluorine Chemistry. 123, 1, p. 75-80 6 p.

研究成果: Article

Amines

amines

Derivatives

Cyclization

stannic chloride

18 引用 (Scopus)

Catalytic asymmetric desymmetrization of meso-diamide derivatives through enantioselective N-allylation with a chiral π-allyl Pd catalyst: Improvement and reversal of the enantioselectivity

Kitagawa, O., Matsuo, S., Yotsumoto, K. & Taguchi, T., 2006 3 17, ： : Journal of Organic Chemistry. 71, 6, p. 2524-2527 4 p.

研究成果: Article

Allylation

Diamide

Enantioselectivity

Derivatives

Catalysts

42 引用 (Scopus)

Catalytic asymmetric iodocarbocyclization reaction

Inoue, T., Kitagawa, O., Ochiai, O., Shiro, M. & Taguchi, T., 1995 12 18, ： : Tetrahedron Letters. 36, 51, p. 9333-9336 4 p.

研究成果: Article

Enantioselectivity

Titanium

Derivatives

Cyclopentanes

X rays

42 引用 (Scopus)

Catalytic Asymmetric Iodocarbocyclization Reaction.

Inoue, T., Kitagawa, O., Ochiai, O., Shiro, M. & Taguchi, T., 1995 12 15, ： : Tetrahedron Lett.. 36, p. 9333-9336

研究成果: Article

54 引用 (Scopus)

Catalytic Asymmetric Iodocarbocyclization Reaction of 4-Alkenylmalonates and Its Application to Enantiotopic Group Selective Reaction

Inoue, T., Kitagawa, O., Saito, A. & Taguchi, T., 1997, ： : Journal of Organic Chemistry. 62, 21, p. 7384-7389 6 p.

研究成果: Article

Enantioselectivity

Malonates

Derivatives

54 引用 (Scopus)

Catalytic Asymmetric Iodocarbocyclization Reaction of 4-Alkenylmalonates and Its Application to Enantiotopic Group Selective Reaction.

Inoue, T., Kitagawa, O., Saito, A. & Taguchi, T., 1997 10 15, ： : J. Org. Chem.. 62, p. 7384-7389

研究成果: Article

57 引用 (Scopus)

Catalytic asymmetric synthesis of optically active atropisomeric anilides through enantioselective N-allylation with chiral Pd-tol-BINAP catalyst

Kitagawa, O., Kohriyama, M. & Taguchi, T., 2002 11 29, ： : Journal of Organic Chemistry. 67, 24, p. 8682-8684 3 p.

研究成果: Article

Anilides

Allylation

Carbonates

Derivatives

Catalysts

57 引用 (Scopus)

Catalytic Asymmetric Synthesis of Optically Active Atropisomeric Anilides through Enantioselective N-Allylation with Chiral Pd-tol-BINAP Catalyst.

Kitagawa, O., Kohriyama, M. & Taguchi, T., 2002 11 30, ： : J. Org. Chem.. 67, p. 8682-8684

研究成果: Article

Catalytic Asymmetric Synthesis of Vicinal Diamine Derivatives through Enantioselective N-Allylation using Chiral -Allyl Pd-Catalyst.

Kitagawa, O., Yotsumoto, K., Kohriyama, M., Dobashi, Y. & Taguchi, T., 2004 10 1, ： : Org. Lett.. 6, p. 3605-3607

研究成果: Article

28 引用 (Scopus)

Catalytic asymmetric synthesis of vicinal diamine derivatives through enantioselective N-allylation using chiral π-allyl Pd-catalyst

Kitagawa, O., Yotsumoto, K., Kohriyama, M., Dobashi, Y. & Taguchi, T., 2004 9 30, ： : Organic Letters. 6, 20, p. 3605-3607 3 p.

研究成果: Article

Allylation

Diamide

Diamines

diamines

Derivatives

Catalytic Asymmetyric Desymmetrization of meso-Diamide derivatives through Enantioselective N-Allylation Using Chiral -Allyl Pd Catalyst: Improvement and Reversal of the Enantioselectivity.

Kitagawa, O., Matsuo, S., Yotsumoto, K. & Taguchi, T., 2006 2 1, ： : J. Org. Chem.. 71, p. 2524-2527

研究成果: Article

23 引用 (Scopus)

Catalytic enantioselective synthesis of atropisomeric 2-aryl-4-quinolinone derivatives with an N-C chiral axis

Takahashi, I., Morita, F., Kusagaya, S., Fukaya, H. & Kitagawa, O., 2012 12 15, ： : Tetrahedron: Asymmetry. 23, p. 1657-1662

研究成果: Article

23 引用 (Scopus)

Catalytic enantioselective synthesis of atropisomeric 2-aryl-4-quinolinone derivatives with an N-C chiral axis

Takahashi, I., Morita, F., Kusagaya, S., Fukaya, H. & Kitagawa, O., 2012 12 31, ： : Tetrahedron Asymmetry. 23, 24, p. 1657-1662 6 p.

研究成果: Article

4-Quinolones

Amination

aniline

ketones

Derivatives

Catalytic Enantioselective Synthesis of Atropisomeric 4-Quinolinones with an N-C Chiral axis

Takahashi, I., Fumika, F., Morita, M., Izumi, S. & Kitagawa, O., 2012 10 30, ： : Default journal.

研究成果: Article

47 引用 (Scopus)

Catalytic enantioselective synthesis of atropisomeric indoles with an N-C chiral axis

Ototake, N., Morimoto, Y., Mokuya, A., Fukaya, H., Shida, Y. & Kitagawa, O., 2010 6 18, ： : Chemistry - A European Journal. 16, 23, p. 6752-6755 4 p.

研究成果: Article

Indoles

palladium chloride

1,3-benzodioxole

47 引用 (Scopus)

Catalytic Enantioselective Synthesis of Atropisomeric Indoles with an N-C Chiral Axis.

Ototake, N., Morimoto, Y., Mokuya, A., Fukaya, H., Shida, Y. & Kitagawa, O., 2010 5 13, ： : Chem. Eur. J.. 16, p. 6752-6755

研究成果: Article

26 引用 (Scopus)

Catalytic enantioselective synthesis of key intermediates for NET inhibitors using atropisomeric lactam chemistry

Kitagawa, O., Kurihara, D., Tanabe, H., Shibuya, T. & Taguchi, T., 2008 1 14, ： : Tetrahedron Letters. 49, 3, p. 471-474 4 p.

研究成果: Article

Lactams

Enantioselectivity

Alkylation

Hydration

16 引用 (Scopus)

Catalytic Enantioselective Synthesis of N-C Axially Chiral Mebroqualone and Its Derivatives through Reductive Asymmetric Desymmetrization

Hirai, M., Terada, S., Yoshida, H., Ebine, K., Hirata, T. & Kitagawa, O., 2016 11 4, ： : Organic Letters. 18, 21, p. 5700-5703 4 p.

研究成果: Article

Quinazolinones

Enantioselectivity

Derivatives

catalysts

Catalysts

15 引用 (Scopus)

Catalytic Enantioselective Synthesis of N-C Axially Chiral Phenanthridin-6-one Derivatives

Hirata, T., Takahashi, I., Suzuki, Y., Yoshida, H., Hasegawa, H. & Kitagawa, O., 2016 1 4, ： : Journal of Organic Chemistry. 81, 1, p. 318-323 6 p.

研究成果: Article

Bearings (structural)

Amination

Enantioselectivity

Nitrogen

Derivatives

Catalytic Enantioselective Synthesis of N-C Axially Chiral Sulfonamides through Chiral Palladium-Catalyzed N-Allylation

Kikuchi, Y., Nakamura, C., Matsuoka, M., Asami, R. & Kitagawa, O., 2019 6 21, ： : Journal of Organic Chemistry. 84, 12, p. 8112-8120 9 p.

研究成果: Article

Allylation

Sulfonamides

Palladium

Ligands

Derivatives

12 引用 (Scopus)

Catalytic enantioselective synthesis of novel atropisomeric compounds having an N-C chiral axis and their application to asymmetric reaction

Takahashi, M. & Kitagawa, O., 2011 9, ： : Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry. 69, 9, p. 985-993 9 p.

研究成果: Article

Anilides

Lactams

Derivatives

Indoles

Amination

10 引用 (Scopus)

Chiral additive induced self-disproportionation of enantiomers under MPLC conditions: Preparation of enantiomerically pure samples of 1-(aryl)ethylamines from racemates

Goto, M., Tateishi, K., Ebine, K., Soloshonok, V. A., Roussel, C. & Kitagawa, O., 2016 5 1, ： : Tetrahedron Asymmetry. 27, 7-8, p. 317-321 5 p.

研究成果: Article

Ethylamines

Enantiomers

enantiomers

preparation

elution

17 引用 (Scopus)

Chiral initiator-induces self-disproportionation of enantiomers via achiral chromatography: Application to enantiomer separation of racemate

Tateishi, K., Tsukagoshi, S., Nakamura, T., Watanabe, S., Soloshonok, V. A. & Kitagawa, O., 2013 9 18, ： : Tetrahedron Letters. 54, 38, p. 5220-5223 4 p.

研究成果: Article

Enantiomers

Chromatography