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1

Unusual cerium(III) chloride-promoted reactions of alkenyl grignard reagents or alkenyl-lithiums with 1,3-diphenyl-2-propanone: Formation and trapping of diorganometallic species

Tsuneo Imamoto, Toshihiko Hatajima, the late Koreharu Ogata, Masayoshi Nishiura

Journal:

Applied Organometallic Chemistry

Year:

1995

Language:

english

File:

PDF, 607 KB

english, 1995

2

Revision of the structure and absolute configuration of cassialactone

Susumu Kitanaka, Koreharu Ogata, Michio Takido

Journal:

Year:

1990

Language:

english

File:

PDF, 396 KB

english, 1990

3

(−)-1-methylcorypalline, an isoquinoline alkaloid from Arthrocnemum glaucum

Ashraf T. Khalil, Ahmed F. Halim, Koreharu Ogata, Toshikazu Sekine, Isamu Murakoshi

Journal:

Year:

1992

Language:

english

File:

PDF, 334 KB

english, 1992

4

Negative hyperconjugation does not play an important role in α-fluoro sulfides: An experimental demonstration

Makoto Fujita, Makoto Suzuki, Koreharu Ogata, Katsuyuki Ogura

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 207 KB

english, 1991

5

Cerium chloride promoted unusual coupling reactions of alkenyl grignard reagents and alkenyllithiums

Tsuneo Imamoto, Toshihiko Hatajima, Koreharu Ogata

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 236 KB

english, 1991

6

Photochemistry of 2-(3,4,5-trimethoxyphenyl)-4-(3,4-methylenedioxyphenyl)-4-oxo-2-butenonitrile (β-cyanochalcone) and its related compounds

Tsutomu Ishikawa, Nobuyuki Koseki, Tomoko Furukawa, Eri Sakurada (nee Kawanabe), Chiharu Koseki, Yuki Saito, Koreharu Ogata, Takashi Harayama, Hisashi Ishii

Journal:

Year:

1994

Language:

english

File:

PDF, 1.10 MB

english, 1994

7

Studies on the indole alkaloids of gelsem1um elegans (thailand): structure elucidation and proposal of biogenetic route

Dhavadee Ponglux, Sumphan Wongseripipatana, Sanan Subhadhirasakul, Hiromitsu Takayama, Masaki Yokota, Koreharu Ogata, Chada Phisalaphong, Norio Aimi, Shin-ichiro Sakai

Journal:

Year:

1988

Language:

english

File:

PDF, 1.36 MB

english, 1988

8

[2.2](4,4' )Azobenzenophane. synthesis, structure, and cis-trans isomerization

Nobuyuki Tamaoki, Koreharu Ogata, Kenichi Koseki, Tsuguo Yamaoka

Journal:

Year:

1990

Language:

english

File:

PDF, 652 KB

english, 1990

9

A new class of indole alkaloid ‘elegansamine’ constructed from a monoterpenoid indole alkaloid and an iridoid

Dhavadee Ponglux, Sumphan Wongseripipatana, Hiromitsu Takayama, Koreharu Ogata, Norio Aimi, Shin-ichiro Sakai

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 146 KB

english, 1988

10

Synthesis of 5-amino-2-cyano-4-silylpyrroles from silylacetylenes and trimethylsilyl cyanide

Tetsuo Kusumoto, Tamejiro Hiyama, Koreharu Ogata

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 221 KB

english, 1986

11

Synthetic approaches to eudistomins. Part 1. Synthesis of 1-amino-3-thiaindolo [2,3-a] quinolizidine

Masako Nakagawa, Jin-Jun Liu, Koreharu Ogata, Tohru Hino

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 220 KB

english, 1986

12

A new system for molecular recognition: Highly specific inclusion of (S)-isopropyl phenyl sulfoxide by solid (R)-phenylglycyl-(R)-phenylglycine

Katsuyuki Ogura, Tohru Uchida, Makoto Noguchi, Masanori Minoguchi, Atsuko Murata, Makoto Fujita, Koreharu Ogata

Journal:

Tetrahedron Letters

Year:

1990

Language:

english

File:

PDF, 271 KB

english, 1990

13

Alkaloids of kopsia jasminiflora from Thailand

Nijsiri Ruangrungsi, Kittisak Likhitwitayawuid, Vichien Jongbunprasert, Dhavadee Ponglux, Norio Aimi, Koreharu Ogata, Megumi Yasuoka, Joju Haginiwa, Shin-ichiro Sakai

Journal:

Tetrahedron Letters

Year:

1987

Language:

english

File:

PDF, 259 KB

english, 1987

14

Reconfirmation of the structure of (+)-retamine from Lygos raetam Var. sarcocarpa by X-ray analysis

Osama B. Abdel-Halim, Toshikazu Sekine, Ahmed F. Halim, Hosny Abdel-Fattah, Kazuki Saito, Koreharu Ogata, Isamu Murakoshi

Journal:

Phytochemical Analysis

Year:

1995

Language:

english

File:

PDF, 410 KB

english, 1995

15

Palladium(II)-directed assembly of macrocyclic dinuclear complexes composed of (en)Pd2+ and bis(4-pyridyl)-substituted bidentate ligands. Remarkable ability for molecular recognition of electron-rich aromatic guests

Fujita, Makoto, Nagao, Satoshi, Iida, Masashi, Ogata, Koreharu, Ogura, Katsuyuki

Journal:

Journal of the American Chemical Society

Year:

1993

Language:

english

File:

PDF, 359 KB

english, 1993

16

Unusually stable .gamma.-lactone ring fused norcaradienes from intramolecular cyclization of vinylcarbenes

Kohmoto, Shigeo, Kawatsuji, Teruyuki, Ogata, Koreharu, Yamamoto, Makoto, Yamada, Kazutoshi

Journal:

Journal of the American Chemical Society

Year:

1991

Language:

english

File:

PDF, 452 KB

english, 1991

17

Diels-Alder reactions of dihydropyridinones: synthetic entry to the manzamine A tricyclic core

Torisawa, Yasuhiro, Nakagawa, Masako, Hosaka, Toshihiro, Tanabe, Kiyoshi, Lai, Ziping, Ogata, Koreharu, Nakata, Tadashi, Oishi, Takeshi, Hino, Tohru

Journal:

Journal of Organic Chemistry

Year:

1992

Language:

english

File:

PDF, 1.03 MB

english, 1992

18

Phase separator for flow injection analysis

Ogata, Koreharu., Taguchi, Kiyomi., Imanari, Toshio.

Journal:

Analytical Chemistry

Year:

1982

Language:

english

File:

PDF, 393 KB

english, 1982

19

The first and biomimetic construction of the new skeleton of gelselegine-type oxindole alkaloids

Takayama, Hiromitsu, Kitajima, Mariko, Ogata, Koreharu, Sakai, Shinichiro

Journal:

Journal of Organic Chemistry

Year:

1992

Language:

english

File:

PDF, 232 KB

english, 1992

20

Synthesis and structure determination of [1,2]dithiolo[1,5-b][1,2,4]dithiazole-4-S IV derivatives

Yokoyama, Masataka, Shiraishi, Tadashi, Hatanaka, Hidekatsu, Ogata, Koreharu

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1985

Language:

english

File:

PDF, 207 KB

english, 1985

21

Notes. Crystal structure of 2,4-bis(phenylthio)-1,3-dithia-2?5,4?5-diphosphetane 2,4-disulphide

Yokoyama, Masataka, Ogata, Koreharu

Journal:

Journal of the Chemical Society Dalton Transactions

Year:

1988

Language:

english

File:

PDF, 195 KB

english, 1988

22

New evidence for the presence of a spiroindolenine intermediate in Pictet?Spengler reaction of N b-hydroxytryptamine

Nakagawa, Masako, Liu, Jinjun, Ogata, Koreharu, Hino, Tohru

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1988

Language:

english

File:

PDF, 191 KB

english, 1988

23

Heteroatom rearrangements. S,N, O,N, and N,N double rearrangements. X-Ray molecular structure of 5-cyano-6-methylthio-2,3-diphenyl-pyrimidin-4(3H)-one

Yokoyama, Masataka, Hatanaka, Hidekatsu, Sasaki, Atsuhi, Shiraishi, Tadashi, Kumata, Katsushi, Sakamoto, Kayoko, Ogata, Koreharu

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1986

Language:

english

File:

PDF, 1.06 MB

english, 1986

24

A New Evidence for the Presence of a Spiroindolenium Species in the Pictet-Spengler Reaction

Nakagawa, Masako, Kawate, Tomohiko, Ogata, Koreharu, Hino, Tohru

Journal:

Year:

1992

Language:

english

File:

PDF, 270 KB

english, 1992

25

Structure of Pelirine and Chemical Conversion of Gardnerine to 11-Methoxy-16-epiaffinine

Sakai, Shin-ichiro, S. C. Wan, Alfred, Yokota, Masaki, Ogata, Koreharu, Aimi, Norio

Journal:

Year:

1987

Language:

english

File:

PDF, 107 KB

english, 1987

26

Crystal Structure of 4,4′,5,5′-Tetrachloro-2,2′-bi-1,3-dioxolane

Huang, Hsing Hua, Ogata, Koreharu, Sakai, Shin-ichiro, Sim, Keng Yeow

Journal:

Bulletin of the Chemical Society of Japan

Year:

1990

File:

PDF, 269 KB

1990

27

Determination of thiocyanate, thiosulfate, sulfite and nitrite by high performance liquid chromatography coupled with electrochemical detection.

Imanari, Toshio, Ogata, Koreharu, Tanabe, Shinzo, Toida, Toshihiko, Kawanishi, Takehiko, Ichikawa, Masaki

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1982

File:

PDF, 313 KB

1982

28

Flame atomic absorption spectrophotometry coupled with solvent extraction/flow injection analysis.

Ogata, Koreharu, Tanabe, Shinzo, Imanari, Toshio

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1983

File:

PDF, 325 KB

1983

29

Elucidation of the structures of olivoretin B and C.

Hitotsuyanagi, Yukio, Yamaguchi, Keiichi, Ogata, Koreharu, Aimi, Norio, Sakai, Shinichiro, Koyama, Yasumasa, Endo, Yasuyuki, Shudo, Koichi, Itai, Akiko, Iitaka, Yoichi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1984

File:

PDF, 500 KB

1984

30

Indole alkaloids isolated from Gelsemium elegans (Thailand): 19-(Z)-akuammidine, 16-epi-voacarpine, 19-hydroxydihydrogelsevirine, and the revised structure of koumidine.

Sakai, Shin-ichiro, Wongseripipatana, Sumphan, Ponglux, Dhavadee, Yokota, Masaki, Ogata, Koreharu, Takayama, Hiromitsu, Aimi, Norio

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1987

Language:

english

File:

PDF, 420 KB

english, 1987

31

The structures of additional teleocidin class tumor promoters.

Sakai, Shin-ichiro, Hitotsuyanagi, Yukio, Yamaguchi, Keiichi, Aimi, Norio, Ogata, Koreharu, Kuramochi, Tadao, Seki, Hiroko, Hara, Ritsuko, Fujiki, Hirota, Suganuma, Masami, Sugimura, Takashi, Endo, Ya

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1986

File:

PDF, 387 KB

1986

32

Gardneria alkaloids. Part 14. The structure of gardfloramine and 18-demethyoxygardfloramine.

Sakai, Shin-ichiro, Aimi, Norio, Yamaguchi, Keiichi, Ogata, Koreharu, Haginiwa, Joju

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1987

Language:

english

File:

PDF, 286 KB

english, 1987

33

Studies on the constituents of the leaves of Cassia torosa Cav. I. The structures of two new C-glycosylflavones.

KITANAKA, Susumu, OGATA, Koreharu, TAKIDO, Michio

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1989

File:

PDF, 644 KB

1989

34

Studies on the constituents of Picrodendron baccatum growing in Indonesia. II. Structures of two new sesquiterpene lactones, picrodendrins C and D.

OHMOTO, Taichi, KOIKE, Kazuo, FUKUDA, Hiroshi, MITSUNAGA, Katsuyoshi, OGATA, Koreharu, KAGEI, Kengo

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1989

File:

PDF, 572 KB

1989

35

The Pictet-Spengler Reaction of Nb-Hydroxytryptamines and Cysteinals. II. Temperature Effects, Stereochemistry and Mechanism.

LIU, Jinjun, NAKAGAWA, Masako, OGATA, Koreharu, HINO, Tohru

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1991

File:

PDF, 770 KB

1991

36

Stable sulfur ylides. XII. Reaction of 3-alkyl(aryl)thio-silyloxydienes derived from stable sulfur ylides with aromatic aldehydes. Synthesis and structure of thiolanium ylides.

IGARASHI, Jun-etsu, WATANABE, Noriyuki, KINOSHITA, Toshio, OGATA, Koreharu, FURUKAWA, Sunao

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1990

File:

PDF, 854 KB

1990

37

Ailanthoidine, a novel benzo(C)phenanthridine alkaloid with a cyanopyridine pendant, from a Xanthoxylum species.

ISHII, Hisashi, ISHIKAWA, Tsutomu, TAKEDA, Sunao, MIHARA, Mari, KOYAMA, Kazuo, OGATA, Koreharu, HARAYAMA, Takashi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1991

File:

PDF, 452 KB

1991

38

"Studies on the chemical constituents of rutaceous plants." Part 71. Photochemistry of 2-(3,4,5-trimethoxyphenyl)-4-(3,4-methylenedioxyphenyl)-4-oxo-2-butenonitrile(.BETA.-cyanochalcone): Anomalous dimerization through isomerization in the solid state.

ISHII, Hisashi, SAKURADA, Eri, FURUKAWA, Tomoko, KOSEKI, Chiharu, OGATA, Koreharu, KOSEKI, Nobuyuki, ISHIKAWA, Tsutomu, HARAYAMA, Takashi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1991

File:

PDF, 495 KB

1991

39

Studies on the Chemical Constituents of Rutaceous Plants. Part 70. Re-examination of the Synthesis of 7,8-Dimethoxy-2-methyl-3-(4',5'-methylenedioxy-2'-vinylphenyl)isocarbostyril.

ISHII, Hisashi, TAKEDA, Sunao, OGATA, Koreharu, HANAOKA, Miyoji, HARAYAMA, Takashi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1991

File:

PDF, 607 KB

1991

40

10.2116/bunsekikagaku.24.279

OGATA, Koreharu, SAKAGUCHI, Takeichi, ICHIKAWA, Yoshiko, DEGUCHI, Fumiko, FUNAOKA, Noriko, KIYOTA, Chiomi

Journal:

Year:

1975

File:

PDF, 586 KB

1975

41

10.2116/bunsekikagaku.29.11_764

TOIDA, Toshihiko, OGATA, Koreharu, TANABE, Shinzo, IMANARI, Toshio

Journal:

Year:

1980

File:

PDF, 596 KB

1980

42

10.2116/bunsekikagaku.30.30

TANABE, Shinzo, TOIDA, Toshihiko, OGATA, Koreharu, TAGUCHI, Kiyomi, IMANARI, Toshio

Journal:

Year:

1981

File:

PDF, 1001 KB

1981

43

10.2116/bunsekikagaku.31.11_641

OGATA, Koreharu, TAGUCHI, Kiyomi, IMANARI, Toshio

Journal:

Year:

1982

File:

PDF, 1.05 MB

1982

44

10.2116/bunsekikagaku.32.20

TAGUCHI, Kiyomi, OGATA, Koreharu, TANAKA, Kanako, TANABE, Shinzo, IMANARI, Toshio

Journal:

Year:

1983

File:

PDF, 688 KB

1983

45

Determination of silicate by flow injection analysis coupled with suppression column and solvent extraction system.

OGATA, Koreharu, SOMA, Shinobu, KOSHIISHI, Ichiro, TANABE, Shinzo, IMANARI, Toshio

Journal:

Year:

1984

Language:

english

File:

PDF, 337 KB

english, 1984

46

10.1248/jhs1956.27.323

MURAKAMI, KYOKO, OGATA, KOREHARU, TAGUCHI, KIYOMI, IMANARI, TOSHIO

Journal:

Year:

1981

File:

PDF, 403 KB

1981

47

Studies on the alkaloids of Picrasma quassioides Bennet. VIII X-ray crystal structure analysis of picrasidine-F.

KOIKE, KAZUO, OHMOTO, TAICHI, OGATA, KOREHARU

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1986

File:

PDF, 676 KB

1986

48

10.2116/bunsekikagaku.30.4_200

MURAKAMI, Kyoko, ITO, Yuko, TAGUCHI, Kiyomi, OGATA, Koreharu, IMANARI, Toshio

Journal:

Year:

1981

File:

PDF, 780 KB

1981