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Your search keyword '"Hiroaki Takayama"' showing total 12 results
Start Over Author "Hiroaki Takayama" Journal chemischer informationsdienst
12 results on '"Hiroaki Takayama"'

2. ChemInform Abstract: SYNTHESES AND DIFFERENTIATING ACTION OF VITAMIN D ENDOPEROXIDES. SINGLET OXYGEN ADDUCTS OF VITAMIN D DERIVATIVES IN HUMAN MYELOID LEUKEMIA CELLS (HL-60)

Author

H. Tanaka, Takayoshi Suzuki, M Ohmori, C. Miyaura, Sachiko Yamada, Hiroaki Takayama, Keiko Yamamoto, Y. Shiina, Y. Nishii, Isao Matsunaga, Tatsuo Suda, E. Abe, and H. Naito

Subjects
chemistry.chemical_compound, Chemistry, Stereochemistry, Singlet oxygen, Vitamin D and neurology, Myeloid leukemia, General Medicine, Adduct
Published
1985
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4. ChemInform Abstract: THE CONTROL OF ORIENTATION OF POLONOVSKI AND THE RELATED REACTIONS

Author

Takashi Nomoto and Hiroaki Takayama

Subjects
chemistry.chemical_compound, Crystallography, Chemistry, Azocine, General Medicine, Orientation (graph theory)
Abstract

A novel base-induced Polonovski-type reaction is described; the regiochemistry of the Polonovski and related reactions can be examined by using 2-methoxytetrahydro-6,12-methanodibenz[c.f]azocine N-oxide (1b) as a probe.

Published
1985
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5. ChemInform Abstract: A NEW ROUTE TO (-)-CHERYLLINE VIA A REGIOCONTROLLED POLONOVSKI-TYPE REACTION AS THE KEY STEP

Author

Nobuyuki Nasui, Hiroaki Takayama, and Takashi Nomoto

Subjects
chemistry.chemical_compound, Chemistry, Yield (chemistry), Key (cryptography), Azocine, General Medicine, Combinatorial chemistry, Cherylline
Abstract

A facile and efficient synthesis of (–)-cherylline (1) was accomplished in 46% overall yield starting from the readily accessible (12S)-(–)-3,9-dibenzyloxy-2-methoxy-tetrahydro-6,12-methanodibenz[c.f]azocine (4)viaa regiocontrolled Polonovski-type reaction as the key step.

Published
1985
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7. ChemInform Abstract: Regioselective Alkylation of 3-Substituted 3-Sulfolenes

Author

Hiromasa Suzuki, Sachiko Yamada, Takashi Nomoto, and Hiroaki Takayama

Subjects
Steric effects, chemistry.chemical_compound, Chemistry, Regioselectivity, Organic chemistry, General Medicine, Alkylation, Sulfone
Abstract

Alkylation par des iodures d'ethyle ou de butyle: etude de l'effet du substituant en 3 sur l'orientation en 2 ou en 5 de la reaction

Published
1986
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11. ChemInform Abstract: REACTION OF 1-METHOXYIMINO-6-NITROHEXA-2,4-DIENE, RESULTING FROM THE REACTION OF N-METHOXYPYRIDINIUM IODIDE WITH NITROMETHANE

Author

Hiroaki Takayama

Subjects
chemistry.chemical_classification, Nitromethane, Diene, Diazomethane, Iodide, General Medicine, medicine.disease_cause, Medicinal chemistry, chemistry.chemical_compound, Acetic anhydride, Benzoyl chloride, chemistry, medicine, Ultraviolet
Abstract

Chemical transformations of 1-methoxyimino-6-nitrohexa-2, 4-diene (II), resulted from the reaction of N-methoxypyridinium iodide (I) with nitromethane, were examined in relation to the nitro-aci-nitro prototropy. II reacted with diazomethane to afford methyl 1-methoxyimino-hexa-2, 4-diene-6-acinitronate (III), with acetic anhydride and with benzoyl chloride to give O-acetate and O-benzoate of 1-methoxyimino-hexa-2, 4-diene-6-hydroxamic acid (VI) respectively. The ultraviolet spectra of them were correlated to their structures.

Published
1979
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