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Keiji Muraoka

Kumamoto University

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Publication

Featured researches published by Keiji Muraoka.

Chemical & Pharmaceutical Bulletin | 1981

Reaction of Aromatic N-Oxides with Dipolarophiles. IV. Factors affecting the 1, 3-Cycloaddition of Pyridine 1-Oxide with Phenyl Isocyanates

Takuzo Hisano; Toshikazu Matsuoka; Kazuhiro Tsutsumi; Keiji Muraoka; Masataka Ichikawa

Chemical & Pharmaceutical Bulletin | 1979

Acidic properties of benzimidazoles and substituent effects. IV. Relationship between the acidities of N'-(substituted phenyl)arylamidines and ring closures to imidazole.

Masataka Ichikawa; Shuichi Nabeya; Keiji Muraoka; Takuzo Hisano

Organic Preparations and Procedures International | 1978

ACIDIC PROPERTIES OF BENZIMIDAZOLES AND SUBSTITUENT EFFECTS. III.: THE SUBSTITUENT EFFECT ON THE IMIDAZOLE CYCLIZATION FROM N-(m-SUBSTITUTED-PHENYL) PICOLYLAMIDINES

Masataka Ichikawa; Shuichi Nabeya; Keiji Muraoka; Takuzo Hisano

Chemical & Pharmaceutical Bulletin | 1974

Reaction of Aromatic N-Oxides with Dipolarophiles. I. Reaction Products of 3-Picoline 1-Oxide with Phenyl Isocyanate

Takuzo Hisano; Shin Yoshikawa; Keiji Muraoka

Chemical & Pharmaceutical Bulletin | 1979

Reaction of aromatic N-oxides with dipolarophiles. III. Cycloadditions of substituted phenyl isocyanates to 3,5-dimethyl and 3,5-dibromopyridine N-oxides and X-ray crystal structures of the isomeric cycloadducts.

Takuzo Hisano; Masataka Ichikawa; Toshikazu Matsuoka; Hisao Hagiwara; Keiji Muraoka; Tetsuya Komori; Kazunobu Harano; Yoshiteru Ida; Arild T. Christensen

Organic Preparations and Procedures International | 1973

ISOLATION AND CHARACTERIZATION OF TWO PRIMARY CYCLOADDUCTS FROM THE REACTION OF PHENYLISOCYANATE WITH 3-PICOLINE-N-OXIDE

Takuzo Hisano; Shin Yoshikawa; Keiji Muraoka

Chemical & Pharmaceutical Bulletin | 1976

Studies on Organosulfur Compounds. XIV. Sulfurations and Oxidations of 2, 3-Disubstituted 4 (3H)-Quinazolinones

Takuzo Hisano; Masataka Ichikawa; Keiji Muraoka; Yuko Yabuta; Yutaka Kido; Motoo Shibata

Chemical & Pharmaceutical Bulletin | 1986

Reaction of Aromatic N-Oxides with Dipolarophiles. XI. : 1, 3-Dipolar Cycloaddition Reaction of Pyridine N-Oxides with Tosyl Isocyanate and One-Pot Synthesis of 2-Oxooxazolo-[4, 5-b]pyridine Derivatives

Takuzo Hisano; Kazunobu Harano; Ryuichi Fukuoka; Toshikazu Matsuoka; Keiji Muraoka; Ikuo Shinohara

Yakugaku Zasshi-journal of The Pharmaceutical Society of Japan | 1977

Studies on Organosulfur Compounds. XVI : Decarboxylation of Anthranilic Acid during 4 (3H)-Quinazolinone Cyclization Process

Takuzo Hisano; Keiji Muraoka; Masataka Ichikawa

Organic Preparations and Procedures International | 1977

AN IMPROVED SYNTHESIS OF 2-HETEROARYL-3-PHENYL-4(3H)-QUINAZOLINONES

Takuzo Hisano; Keiji Muraoka; Masataka Ichikawa

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Collaboration

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Takuzo Hisano

Kumamoto University

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Masataka Ichikawa

Kumamoto University

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Toshikazu Matsuoka

Kumamoto University

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Kazunobu Harano

Kyushu University

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Shin Yoshikawa

Kumamoto University

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Shuichi Nabeya

Kumamoto University

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Tetsuya Komori

Kyushu University

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Yoshiteru Ida

Kyushu University

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Ikuo Shinohara

Kumamoto University

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Kazuhiro Tsutsumi

Kumamoto University

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