Katsuo Ohkata: search on Z-Library

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1

Asymmetric Induction in Intramolecular [5+2] Cycloaddition of 2-(4-Alkenyl)-5-benzoyloxy(or 5-Silyloxy)-4-pyrones Involving Migration of the Pyrone O-5 Group to O-4

Ohkata, Katsuo, Ohmori, Naoki, Yoshimura, Miki

Journal:

Year:

1997

Language:

english

File:

PDF, 151 KB

english, 1997

2

CORRELATION BETWEEN THE REACTION OF KETONES WITH ZINC AND THEIR POLAROGRAPHIC HALF-WAVE REDUCTION POTENTIAL

Asano, Tatsuo, Ohkata, Katsuo, Hanafusa, Terukiyo

Journal:

Chemistry Letters

Year:

1974

Language:

english

File:

PDF, 5.25 MB

english, 1974

3

Highly Stereoselective 7-Membered Ring Synthesis Based upon the Oxidopyrylium–Alkene [5+2]Cycloaddition Reaction

Ohmori, Naoki, Miyazaki, Toru, Kojima, Satoshi, Ohkata, Katsuo

Journal:

Chemistry Letters

Year:

2001

Language:

english

File:

PDF, 39 KB

english, 2001

4

ChemInform Abstract: Highly Stereoselective 7-Membered Ring Synthesis Based upon the Oxidopyrylium—Alkene [5 + 2] Cycloaddition Reaction.

Naoki Ohmori, Toru Miyazaki, Satoshi Kojima, Katsuo Ohkata

Journal:

Year:

2002

File:

PDF, 32 KB

2002

5

Transannular bond formation between the amino and the sulfonio groups in 6,7-dihydro-6-methyl-5H-dibenzo[b,g][1,5]thiazocinium salts. The first example of a sulfurane with an apical alkyl group

Akiba, Kinya., Takee, Kohichi., Shimizu, Yasuko., Ohkata, Katsuo.

Journal:

Journal of the American Chemical Society

Year:

1986

Language:

english

File:

PDF, 898 KB

english, 1986

6

First example of an isolable .sigma.-sulfurane with an apical alkyl group effected by transannular bond formation between the amino and the sulfonio groups

Akiba, Kinya, Takee, Kohichi, Ohkata, Katsuo, Iwasaki, Fujiko

Journal:

Journal of the American Chemical Society

Year:

1983

Language:

english

File:

PDF, 271 KB

english, 1983

7

Highly Asymmetric Induction in the Diels-Alder Reaction of 3-Alkoxycarbonyl-substituted

Akiba, Kin-ya, Ohkata, Katsuo, Kubo, Tomotaka, Miyamoto, Keiko, Ono, Makiko, Yamamoto, Junko

Journal:

Year:

1994

Language:

english

File:

PDF, 121 KB

english, 1994

8

ChemInform Abstract: Highly Z-Selective Synthesis of α,β-Unsaturated Amides with the Peterson Reaction Between α-Silylamides and Aldehydes.

Satoshi Kojima, Hiroki Inai, Tsugihiko Hidaka, Katsuo Ohkata

Journal:

Year:

2000

File:

PDF, 32 KB

2000

9

Asymmetric induction in Darzens condensation by means of (−)-8-phenylmenthyl and (−)-menthyl auxiliaries

Takagi, Ryukichi, Kimura, Jyunji, Shinohara, Yoshihiro, Ohba, Yuko, Takezono, Kyoko, Hiraga, Yoshikazu, Kojima, Satoshi, Ohkata, Katsuo

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1998

Language:

english

File:

PDF, 163 KB

english, 1998

10

Ring transformation equilibrium (bond switch) in 5-(2-aminovinyl)isothiazole system via hypervalent sulfurane. Synthesis, structure determination, and kinetic study

Akiba, Kinya, Kashiwagi, Kohichi, Ohyama, Yoshihiko, Yamamoto, Yohsuke, Ohkata, Katsuo

Journal:

Journal of the American Chemical Society

Year:

1985

Language:

english

File:

PDF, 1.20 MB

english, 1985

11

Selective Ring-expansion of Oxirane into Tetrahydropyran and Tetrahydrofuran by Reagent-controlled Conditions

Tokumasu, Munetaka, Sasaoka, Asami, Hiraga, Yoshikazu, Ohkata, Katsuo

Journal:

Journal of Chemical Research

Year:

1998

Language:

english

File:

PDF, 113 KB

english, 1998

12

REDUCTION OF BENZOYLCYCLOPROPANE DERIVATIVES WITH SODIUM IN AMMONIA

Shiota, Haruyasu, Ohkata, Katsuo, Hanafusa, Terukiyo

Journal:

Chemistry Letters

Year:

1974

Language:

english

File:

PDF, 4.46 MB

english, 1974

13

Studies on Ring-Closing Metathesis for the Formation of the 11-Membered Ring System of Daphnezomine C

Tanabe, Kazuhisa, Fujie, Ayako, Ohmori, Naoki, Hiraga, Yoshikazu, Kojima, Satoshi, Ohkata, Katsuo

Journal:

Bulletin of the Chemical Society of Japan

Year:

2007

Language:

english

File:

PDF, 169 KB

english, 2007

14

Computational Study on the Cyclopropanation Reaction of Ylides Generated from α-Pyridiniumacetates

Matsumura, Shuji, Takagi, Ryukichi, Kojima, Satoshi, Ohkata, Katsuo, Abe, Manabu

Journal:

Year:

2010

Language:

english

File:

PDF, 22.09 MB

english, 2010

15

ChemInform Abstract: Stereoselective Formation of trans-2,5-Disubstituted Tetrahydropyrans by Intramolecular Nucleophilic Substitution and a Computational Study at the AM1 Level.

Ryukichi Takagi, Hiroko Nishitani, Sigeharu Takenami, Kazumasa Okada, Satoshi Kojima, Katsuo Ohkata

Journal:

Year:

2002

Language:

english

File:

PDF, 35 KB

english, 2002

16

Geometric dependence to long-range interaction of fused cyclopropane rings in tris-.sigma.-homotropylium cations

Ohkata, Katsuo, Paquette, Leo A.

Journal:

Journal of the American Chemical Society

Year:

1980

Language:

english

File:

PDF, 1.29 MB

english, 1980

17

Stereoselective syntheses of (+)-rhopaloic acid A and (−)-ent- and (±)-rac-rhopaloic acid A

Takagi, Ryukichi, Sasaoka, Asami, Nishitani, Hiroko, Kojima, Satoshi, Hiraga, Yoshikazu, Ohkata, Katsuo

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1998

Language:

english

File:

PDF, 172 KB

english, 1998

18

Synthesis and reactions of 1,1,2,2-tetra-acylcyclopropanes

Ohkata, Katsuo, Sakai, Takashi, Kubo, Yasuo, Hanafusa, Terukiyo

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1974

Language:

english

File:

PDF, 187 KB

english, 1974

19

Homo-1,4-elimination

Hanafusa, Terukiyo, Imai, Shinobu, Ohkata, Katsuo, Suzuki, Hitomi, Suzuki, Yoshiko

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1974

Language:

english

File:

PDF, 136 KB

english, 1974

20

Substituent Effects for the Benzene Ring on Solvolysis of 3,4-Benzotricyclo[4.3.1.0 1,6 ]dec-3-en-2-yl p -Nitrobenzoate

Journal:

Bulletin of the Chemical Society of Japan

Year:

1976

File:

PDF, 1.70 MB

1976

21

Stereoselective Synthesis of the Hydrophobic Side Chain of Scyphostatin

Takagi, Ryukichi, Tsuyumine, Shinjiro, Nishitani, Hiroko, Miyanaga, Wataru, Ohkata, Katsuo

Journal:

Australian Journal of Chemistry

Year:

2004

Language:

english

File:

PDF, 301 KB

english, 2004

22

ChemInform Abstract: Asymmetric Synthesis of Rhopaloic Acid A Analogues and Their Biological Properties.

Hiroko Nishitani, Asami Sasaoka, Munetaka Tokumasu, Katsuo Ohkata

Journal:

Year:

1999

File:

PDF, 29 KB

1999

23

Highly Z-selective synthesis of α,β-unsaturated amides with the Peterson reaction between α-silylamides and aldehydes

Kojima, Satoshi, Inai, Hiroki, Hidaka, Tsugihiko, Ohkata, Katsuo

Journal:

Chemical Communications

Year:

2000

Language:

english

File:

PDF, 44 KB

english, 2000

24

Three new glycolipids with cytolytic activity from cultured marine dinoflagellate Heterocapsa circularisquama

Hiraga, Yoshikazu, Shikano, Tatsuya, Widianti, Triana, Ohkata, Katsuo

Journal:

Natural Product Research

Year:

2008

Language:

english

File:

PDF, 149 KB

english, 2008

25

Oxidation of .ALPHA.-keto alcohols with triphenylantimony dibromide - Participation of pentavalent antimony.

OHKATA, Katsuo, OHNARI, Hideyuki, AKIBA, Kin-ya

Journal:

NIPPON KAGAKU KAISHI

Year:

1987

File:

PDF, 1.48 MB

1987

26

ChemInform Abstract: Selective Ring Expansion of Oxirane into Tetrahydropyran and Tetrahydrofuran by Reagent-Controlled Conditions.

Munetaka Tokumasu, Asami Sasaoka, Yoshikazu Hiraga, Katsuo Ohkata

Journal:

Year:

1999

File:

PDF, 27 KB

1999

27

ChemInform Abstract: The Julia—Colonna Asymmetric Epoxidation Reaction of Chalcone Catalyzed by Length Defined Oligo-L-leucine: Importance of the N-Terminal Functional Group and Helical Structure of the Catalyst in the Asymmetric Induction.

Ryukichi Takagi, Toshiki Manabe, Akiko Shiraki, Arata Yoneshige, Yoshikazu Hiraga, Satoshi Kojima, Katsuo Ohkata

Journal:

Year:

2000

File:

PDF, 30 KB

2000

28

ChemInform Abstract: The Julia-Colonna Type Asymmetric Epoxidation Reaction Catalyzed by Soluble Oligo-L-leucines Containing an α-Aminoisobutyric Acid Residue: Importance of Helical Structure of the Catalyst on Asymmetric Induction.

Ryukichi Takagi, Akiko Shiraki, Toshiki Manabe, Satoshi Kojima, Katsuo Ohkata

Journal:

Year:

2000

File:

PDF, 30 KB

2000

29

ChemInform Abstract: Hydrophobicity and Structure of 1,2,4-Triazole Derivatives Bearing 1-Carbamoyl and 3-Sulfonyl Groups.

Katsuo Ohkata, Tomoyuki Yano, Satoshi Kojima, Yoshikazu Hiraga, Tomoko Yoshii, Masahiro Hori

Journal:

Year:

2002

File:

PDF, 31 KB

2002

30

Conformational features and chemical behavior of 5H, 7H-dibenzo[B,g][1,5] dithiocin oxides: 1,5-Oxygen shift via a dithiodication intermediate

Katsuo Ohkata, Keiji Okada, Kin-Ya Akiba

Journal:

Heteroatom Chemistry

Year:

1995

Language:

english

File:

PDF, 769 KB

english, 1995

31

Synthesis and chemical behaviors of 12-substituted dibenz[c,f][1,5]azastibocine and dibenz[c,f][1,5]azabismocine derivatives: evidences of 10-Pn-4 type hypervalent interaction

Katsuo Ohkata, Shin Takemoto, Masako Ohnishi, Kin-ya Akiba

Journal:

Tetrahedron Letters

Year:

1989

Language:

english

File:

PDF, 233 KB

english, 1989

32

Influence of solvent viscosity on the rate of hydrolysis of dipeptides by carboxypeptidase Y

Yoshifumi Kanosue, Satoshi Kojima, Katsuo Ohkata

Journal:

Journal of Physical Organic Chemistry

Year:

2004

Language:

english

File:

PDF, 202 KB

english, 2004

33

Apical and equatorial methoxy ligands on sulfuranes: effect on rates of pyridine methylation

Ohkata, Katsuo, Ohnishi, Masako, Yoshinaga, Keiichi, Akiba, Kinya, Rongione, Joseph C., Martin, J. C.

Journal:

Journal of the American Chemical Society

Year:

1991

Language:

english

File:

PDF, 897 KB

english, 1991

34

NOVEL ISOMERIZATION AND RETRO-MANNICH REACTION OF 1,1,2,2-TETRAACYLCYCLOPROPANES

Ohkata, Katsuo, Kubo, Yasuo, Tamaru, Akira, Hanafusa, Terukiyo

Journal:

Chemistry Letters

Year:

1975

Language:

english

File:

PDF, 5.23 MB

english, 1975

35

Syntheses of 1,1,2,2-tetraacylcyclopropane derivatives by photochemical rearrangement of 2,2,4-triacyl-2,3-dihydrofurans

Ohkata, Katsuo, Sakai, Takashi, Kubo, Yasuo, Hanafusa, Terukiyo

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 288 KB

english, 1978

36

RING-TRANSFORMATION FROM ISOTHIAZOLE TO 1,2,4-THIADIAZOLE - POSSIBLE INTERMEDIACY OF π-SULFURANE

Akiba, Kin-Ya, Noda, Akiko, Ohkata, Katsuo

Journal:

Phosphorous and Sulfur and the Related Elements

Year:

1983

Language:

english

File:

PDF, 491 KB

english, 1983

37

Alkylation and H-D Exchange of Tetraazathiapentalenes Fused with Pyrimidine and/or Pyridine Ring

Akiba, Kin-Ya, Yamamoto, Kazuhiro, Ohsawa, Mika, Ohkata, Katsuo

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1997

Language:

english

File:

PDF, 118 KB

english, 1997

38

Asymmetric Synthesis of Rhopaloic Acid A Analogues and Their Biological Properties

Ohkata, Katsuo, Nishitani, Hiroko, Sasaoka, Asami, Tokumasu, Munetaka

Journal:

Year:

1999

Language:

english

File:

PDF, 131 KB

english, 1999

39

On the Study of Various Reductions of 2-Benzoylcyclopentene-1-carboxylic Acid

Ohkata, Katsuo, Hanafusa, Terukiyo

Journal:

Bulletin of the Chemical Society of Japan

Year:

1970

File:

PDF, 616 KB

1970

40

Restricted rotation of pyrimidine ring in symmetrical 10-S-3 sulfuranes: Evaluation of hypervalent NSN bond energy

Katsuo Ohkata, Minoru Ohsugi, Tetsuo Kuwaki, Kazuhiro Yamamoto, Kin-ya Akiba

Journal:

Tetrahedron Letters

Year:

1990

Language:

english

File:

PDF, 225 KB

english, 1990

41

Reaction of a highly spiro-activated cyclopropane with pyridines. A novel intramolecular charge transfer interaction of the product

Ohkata, Katsuo, Tamaru, Akira, Nagai, Takashi, Hanafusa, Terukiyo

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1982

Language:

english

File:

PDF, 509 KB

english, 1982

42

Synthesis of a 4,5-epoxy-2-cyclohexen-1-one derivative via epoxide ring opening, 1,3-carbonyl transposition and epoxide ring regeneration: a synthetic study on a scyphostatin analogue

Takagi, Ryukichi, Tojo, Kengo, Iwata, Masato, Ohkata, Katsuo

Journal:

Organic & Biomolecular Chemistry

Year:

2005

Language:

english

File:

PDF, 214 KB

english, 2005

43

Influence of Polymerization Degree of Poly-L-leucine Catalyst and Substituent Effect on the Juliá-Colonna Asymmetric Epoxidation of Benzalacetophenones

Ohkata, Katsuo, Takagi, Ryukichi, Begum, Shahnaz, Siraki, Akiko, Yoneshige, Arata, Koyama, Kin-ichirou

Journal:

Year:

2004

Language:

english

File:

PDF, 386 KB

english, 2004

44

Stereoselective Formation of trans -2,5-Disubstituted Tetrahydropyrans by Intramolecular Nucleophilic Substitution and a Computational Study at the AM1 Level

Takagi, Ryukichi, Nishitani, Hiroko, Takenami, Sigeharu, Okada, Kazumasa, Kojima, Satoshi, Ohkata, Katsuo

Journal:

Bulletin of the Chemical Society of Japan

Year:

2001

Language:

english

File:

PDF, 396 KB

english, 2001

45

ChemInform Abstract: SUBSTITUENT EFFECTS FOR THE BENZENE RING ON SOLVOLYSIS OF 3,4-BENZOTRICYCLO(4.3.1.01,6)DEC-3-EN-2-YL P-NITROBENZOATE

Journal:

Chemischer Informationsdienst

Year:

1976

File:

PDF, 213 KB

1976

46

ChemInform Abstract: Stereochemical Considerations on the Stereoselective Cyclopropanation Reactions of 3-Aryl-2-phosphonoacrylates Induced by the (-)-8-Phenylmenthyl Group as a Chiral Auxiliary.

Ryukichi Takagi, Miki Hashizume, Minoru Nakamura, Shahnaz Begum, Yoshikazu Hiraga, Satoshi Kojima, Katsuo Ohkata

Journal:

Year:

2002

Language:

english

File:

PDF, 33 KB

english, 2002

47

Asymmetric darzens condensation of ketones with ?-chloroacetates by means of (?)-8-phenylmenthyl auxiliary

Ohkata, Katsuo, Kimura, Jyunji, Shinohara, Yoshihiro, Takagi, Ryukichi, Hiraga, Yoshikazu

Journal:

Chemical Communications

Year:

1996

Language:

english

File:

PDF, 289 KB

english, 1996

48

Stereochemical studies on 3,4-benzobicyclo[4.1.0]hept-3-en-2-ol systems and solvolytic studies on its p-nitrobenzoates

Ogawa, Yutaka, Matsusaki, Hazime, Hanaoka, Kazushi, Ohkata, Katsuo, Hanafusa, Terukiyo

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 944 KB

english, 1978

49

Highly asymmetric induction in the Diels-Alder reaction of 3-alkoxycarbonyl-substituted coumarin

Katsuo Ohkata, Keiko Miyamoto, Shuji Matsumura, Kin-ya Akiba

Journal:

Tetrahedron Letters

Year:

1993

Language:

english

File:

PDF, 270 KB

english, 1993

50

The relative merits of 6π9C bishomoaromatic and 10π13C longicyclic stabilization

Leo A. Paquette, Klaus Jelich, Katsuo Ohkata

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 223 KB

english, 1982

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