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Shigeko Takeda

Nagasaki University

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Chemical & Pharmaceutical Bulletin | 1970

Studies on the Synthesis of Pyridazine Derivatives. XII. Synthesis of 4, 5-Diaminopyridazine Derivatives

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda; Hiroshi Sadaki; Hiroshi Watanabe

Chemical & Pharmaceutical Bulletin | 1970

Studies on the Synthesis of Pyridazine Derivatives. XIII. Synthesis of Imidazo-[4, 5-d]- and v-Triazolo[4, 5-d]pyridazine Derivatives and Reaction of 4-Alkoxy-v-triazolo[4, 5-d]pyridazines with Various Amines

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda; Masato Mori; Hiroshi Sadaki; Hiroshi Watanabe

Chemical & Pharmaceutical Bulletin | 1977

Studies on the Heterocyclic Compounds. XX. The Reaction of 4-Cyano-3, 6-dichloropyridazine with Amines

Mitsuji Yanai; Shigeko Takeda; Tamao Mitsuoka

Chemical & Pharmaceutical Bulletin | 1972

Studies on the Pyridazine Derivatives. XVI. Reaction of 3-Alkoxy-4-nitro-(and 4, 6-dinitro) pyridazine 1-oxides with Amines

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda; Hiroshi Sadaki

Chemical & Pharmaceutical Bulletin | 1977

Studies on the heterocyclic compounds. XXI. A new alkylation of pyridazines with nitromethane and nitroethane.

Mitsuji Yanai; Shigeko Takeda; Makoto Nishikawa

Chemical & Pharmaceutical Bulletin | 1971

Studies on the Pyridazine Derivatives. XV. On the Nucleophilic Reaction of 3-Ethoxy-4, 6-dinitropyridazine 1-Oxide

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda

Chemical & Pharmaceutical Bulletin | 1972

Studies on the Pyridazine Derivatives. XVII. Structural Studies on the Product of 3-Hydrazino-4-aminopyridazine with Formic Acid (A Novel Ring Isomerization)

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda; Masakuni Nishimura; Tsukasa Kuraishi

Chemical & Pharmaceutical Bulletin | 1984

SYNTHESIS OF BICYCLO [4. 3. 0] NONENONE AND BICYCLO [3. 3. 0] OCTENONE DERIVATIVES BY INTRAMOLECULAR WADSWORTH-EMMONS REACTION : FORMAL SYNTHESIS OF THE SESQUITERPENE CEDRENE

Hiroshi Irie; Shigeko Takeda; Atsushi Yamamura; Yukio Mizuno; Hiroshi Tomimasu; Kazunori Ashizawa; Tooru Taga

Chemical & Pharmaceutical Bulletin | 1968

Studies on the Synthesis of Pyridazine Derivatives. IX. Synthesis of 10H-Pyridazino (3,2-b) quinazolin-10-one and Its Derivatives. (3)

Mitsuji Yanai; Toshio Kinoshita; Shigeko Takeda

Chemical & Pharmaceutical Bulletin | 1986

Synthesis of Alkaloids, (±)-Xylopinine and (±)-Tetrahydropalmatine, by a Photo-Induced Rearrangement of Spirobenzylisoquinolines in the Presence of Vitamin C

Kazuo Takeshita; Shigeko Takeda; Hiroshi Irie

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Mitsuji Yanai

Nagasaki University

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Toshio Kinoshita

Nagasaki University

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Hiroshi Sadaki

Nagasaki University

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Makoto Nishikawa

Nagasaki University

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Hiroshi Irie

Nagasaki University

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Hiroshi Watanabe

Kurume University

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Masakuni Nishimura

Nagasaki University

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Kazuo Takeshita

Nagasaki University

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Masato Mori

Nagasaki University

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Tamao Mitsuoka

Nagasaki University

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