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1

Dimethyl (2-oxo-4-methyl-3-pentenyl)phosphonate as a precursor of .alpha.,.alpha.'-dienones. Short syntheses of (.+-.)-.alpha.-atlantone and (.+-.)-ar-turmerone

Motoyoshiya, Jiro, Miyajima, Masae, Hirakawa, Kiyoichi, Kakurai, Toshio

Journal:

Journal of Organic Chemistry

Year:

1985

Language:

english

File:

PDF, 257 KB

english, 1985

2

Acid-induced Ring-opening of 2′-Substituted Spiro[anthracene-9(10H), 1′-cyclopropan]-10-ones

Hirakawa, Kiyoichi, Sato, Hajime

Journal:

Bulletin of the Chemical Society of Japan

Year:

1981

File:

PDF, 356 KB

1981

3

Naphthoquinones from juglandaceae

Kiyoichi Hirakawa, Eriko Ogiue, Jiro Motoyoshiya, Masao Yajima

Journal:

Year:

1986

Language:

english

File:

PDF, 180 KB

english, 1986

4

Novel dimeric products from 10-methyleneanthrone

Hirakawa, Kiyoichi, Nakazawa, Sho

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 684 KB

english, 1978

5

Heterocycles by cycloaddition. Part II. Cycloaddition?extrusion reactions of five-membered mesoionic compounds with benzyne: prepartion of benz[c]azole and benzo[c]thiophen derivatives

Kato, Hiroshi, Nakazawa, Sho, Kiyosawa, Takako, Hirakawa, Kiyoichi

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1976

Language:

english

File:

PDF, 521 KB

english, 1976

6

Syntheses and reactions of spiroanthronetriazolines

Hirakawa, Kiyoichi, Ito, Tsutomu, Okubo, Yoshiji, Nakazawa, Sho

Journal:

Journal of Organic Chemistry

Year:

1980

Language:

english

File:

PDF, 669 KB

english, 1980

7

Syntheses and reactions of spirocyclopropaneanthrones. Part 1. Reactions of p-diazo-ketones with p-quinone methides

Nakazawa, Sho, Hirakawa, Kiyoichi, Fujimori, Shizuyoshi, Iwasaki, Kazuhito

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1979

Language:

english

File:

PDF, 643 KB

english, 1979

8

2-Alkoxy-3-substituted-4-quinolinols from the thermal reactions of N-phenylketenimines bearing ester groups

Jiro Motoyoshiya, Akira Takagi, Kiyoichi Hirakawa, Toshio Kakurai

Journal:

Journal of Heterocyclic Chemistry

Year:

1986

Language:

english

File:

PDF, 244 KB

english, 1986

9

ChemInform Abstract: HETEROCYCLES BY CYCLOADDITION. PART II. CYCLOADDITION-EXTRUSION REACTIONS OF FIVE-MEMBERED MESOIONIC COMPOUNDS WITH BENZYNE- PREPARATION OF BENZ(C) AZOLE AND BENZO(C)THIOPHENE DERIVATIVES

KATO, HIROSHI, NAKAZAWA, SHO, KIYOSAWA, TAKAKO, HIRAKAWA, KIYOICHI

Journal:

Chemischer Informationsdienst

Year:

1976

File:

PDF, 146 KB

1976

10

Selectivity in the thermal and photochemical fragmentation of the cycloadduct from benzyne and a mesoionic thiazol-4-one

Nakazawa, Sho, Kiyosawa, Takako, Hirakawa, Kiyoichi, Kato, Hiroshi

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1974

Language:

english

File:

PDF, 114 KB

english, 1974

11

Preparations and reactions of 10-(halomethylene)anthrones

Hirakawa, Kiyoichi, Ogiue, Eriko, Motoyoshiya, Jiro, Kakurai, Toshio

Journal:

Journal of Organic Chemistry

Year:

1986

Language:

english

File:

PDF, 659 KB

english, 1986

12

Reactions of spiro-indazoles containing keto-groups. Part 2. Evidence for a spiro-benzocyclopropene intermediate in the thermolysis of anthrone-10-spiro-3?-3?H-indazoles to benz[a]aceanthrylenes

Hirakawa, Kiyoichi, Minami, Yoshihito, Hayashi, Sadao

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1982

Language:

english

File:

PDF, 400 KB

english, 1982

13

Thermal Dimerization of 10-Methyleneanthrone

Hirakawa, Kiyoichi, Ogiue, Eriko, Motoyoshiya, Jiro, Kakurai, Toshio

Journal:

Bulletin of the Chemical Society of Japan

Year:

1986

File:

PDF, 317 KB

1986

14

The Influence of Molecular Conformation on the Electronic Relaxation Processes. Complex Formation in the Ground State and Triple Fluorescences of 6-Acetoxyspiro[aceanthyrylene- 2(1 H ),9′(10′ H )-anthracene]-10′-one

Fujii, Tsuneo, Hirano, Masahiro, Uno, Yoshihiro, Suzuki, Satoshi, Hirakawa, Kiyoichi

Journal:

Bulletin of the Chemical Society of Japan

Year:

1987

File:

PDF, 961 KB

1987

15

ChemInform Abstract: HETEROCYCLES BY CYCLOADDITION. PART II. CYCLOADDITION-EXTRUSION REACTIONS OF FIVE-MEMBERED MESOIONIC COMPOUNDS WITH BENZYNE- PREPARATION OF BENZ(C) AZOLE AND BENZO(C)THIOPHENE DERIVATIVES

KATO, HIROSHI, NAKAZAWA, SHO, KIYOSAWA, TAKAKO, HIRAKAWA, KIYOICHI

Journal:

Chemischer Informationsdienst

Year:

1976

File:

PDF, 146 KB

1976

16

Improved Synthesis of Dibenzo[ a , j ]perylene-8,16-dione

Hirakawa, Kiyoichi, Ogiue, Eriko, Motoyoshiya, Jiro, Kakurai, Toshio

Journal:

Bulletin of the Chemical Society of Japan

Year:

1987

File:

PDF, 430 KB

1987

17

Fluorescence spectra and geometry of 1,2-bis(9-acetoxy-10-anthryl)-ethane

Tsuneo Fujii, Hidenori Yamamoto, Kyoichi Oki, Satoshi Suzuki, Kiyoichi Hirakawa

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1994

Language:

english

File:

PDF, 687 KB

english, 1994

18

Reactions of spiro[fluorenetriazolines]

Hirakawa, Kiyoichi, Tanabiki, Yukio

Journal:

Journal of Organic Chemistry

Year:

1982

Language:

english

File:

PDF, 596 KB

english, 1982

19

Syntheses and reactions of spirocyclopropaneanthrones. Part 2. Rearrangements and cyclopropyl ring-opening reactions of phenyl-substituted spirocyclopropaneanthrones and related compounds

Hirakawa, Kiyoichi, Nosaka, Toshikazu

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1980

Language:

english

File:

PDF, 913 KB

english, 1980

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