荻原 和仁 (オギハラ カズヒト)

Ogihara Kazuhito

写真a

職名

准教授

科研費研究者番号

00194481

現在の所属組織 【 表示 / 非表示

  • 専任   琉球大学   理学部   海洋自然科学科   准教授  

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  •  -  理学博士 

職歴 【 表示 / 非表示

  • 1997年10月
    -
    継続中

      琉球大学 理学部 海洋自然科学科 解析化学講座 准教授  

研究キーワード 【 表示 / 非表示

  • 天然物有機化学

研究分野 【 表示 / 非表示

  • ナノテク・材料 / 構造有機化学、物理有機化学

  • ナノテク・材料 / 生物分子化学

  • ライフサイエンス / 生物有機化学

主たる研究テーマ 【 表示 / 非表示

  • 沖縄産動植物中に含まれる生物活性物質に関する研究

  • 昆虫とその寄主植物との間の化学生態学的研究

論文 【 表示 / 非表示

  • Flavonoids and Isoflavonoids from the Fresh Immature Seeds of Sophora tomentosa L.

    Kazuhito OGIHARA,* Takerou OOYA, Eiken KUNIYOSHI, Toshimasa SUZUKA, and Matsutake HIGA

    Bulletin of Faculty ofScience University of Ryukyus   ( 108 ) 27 - 32   2020年03月

    掲載種別: 研究論文(学術雑誌)

  • Friedel–Crafts-Type Alkylation of Indoles in Water Using Amphiphilic Resin-Supported 1,10-Phenanthroline–Palladium Complex under Aerobic Conditions

    Suzuka Toshimasa, Ooshiro Yuto, Ogihara Kazuhito

    Catalysts ( MDPI )  10   193 - 203   2020年02月 [ 査読有り ]

    掲載種別: 研究論文(学術雑誌)

  • Polymer-Supported Terpyridine–Palladium Complex for the Allylic Alkylation with Arylboronic Acid in Water

    Suzuka Toshimasa, Takayama Naoki, Unten Masanori, Onda Kaoru, Ogihara Kazuhito

    Transactions of the Materials Research Society of Japan ( 一般社団法人 日本MRS )  44 ( 1 ) 41 - 44   2019年01月 [ 査読有り ]

    掲載種別: 研究論文(学術雑誌)

     概要を見る

    <p>  A novel homogeneous transition-metal catalyst, a polymer-supported terpyridine–palladium(II) complex, was found to promote the allylic alkylation with phenylborinic acid under phosphine-free conditions in water with good yield. The catalyst was recovered and reused several times without loss of catalytic activity. To our knowledge, this is the first example of the allylic alkylation with pheylboronic acid in water using a polymer-supported terpyridine–palladium(II) complex under aerobic conditions. The stereochemistry of the allylic alkylation with phenylboronic acid was demonstrated to be not net retention. </p>

  • Naphthoquinone Derivatives from Diospyros maritima.

    Higa M, Takashima Y, Yokaryo H, Harie Y, Suzuka T, Ogihara K

    Chemical & pharmaceutical bulletin ( 公益社団法人 日本薬学会 )  65 ( 8 ) 739 - 745   2017年08月 [ 査読有り ]

    掲載種別: 研究論文(学術雑誌)

     概要を見る

    <p>From the chloroform extract of the fresh fruits of <i>Diospyros maritima</i> BLUME (Ebenaceae), five new naphthoquinone derivatives, 2,7′-dimethyl-2′,3-bijuglone (27), 2,7′-dimethyl-3,3′-bijuglone (28), 2,7′-dimethyl-6,8′-bijuglone (29), 7,7′-dimethyl-3,3′-ethylidenebijuglone (30), and 2′,7-dimethyl-3,6′-ethylidenebijuglone (31), were isolated, in addition to twenty-one known naphthoquinone derivatives: plumbagin (4), droserone (5), 2,3-epoxyplumbagin (8), 3,3′-biplumbagin (9), chitranone (10), 3,8′-biplumbagin (11), elliptinone (12), maritinone (13), isozeylanone (14), methylene-3,3′-biplumbagin (15), ethylidene-3,3′-biplumbagin (16), ethylidene-3,6′-biplumbagin (17), ethylidene-6,6′-biplumbagin (18), 7-methyl-β-dihydrojuglone (19), 7-methyljuglone (20), 2,3-epoxy-7-methyljuglone (21), neodiospyrin (22), mamegakinone (23), ehretione (24), isoxylospyrin (25) and β-dihydroplumbagin (26). The structures of the new compounds were established by spectral analysis. The quinones obtained from the chloroform extract of the fruits were compared with previously reported quinones obtained from ethanol extracts. The quinones in the fruits were categorized in three groups: quinones from ethanol extract only, quinones from chloroform extract only, and quinones from both extracts. The six naphthoquinones, 19–21, 25, 26, and 29, were examined for their ichthyotoxic activity and germination inhibitory activity. Quinones 19–21, 26, and 29 showed ichthyotoxic activity against Japanese killifish (<i>Oryzias latipes</i> var.) at 10 ppm; quinones 19 to 21 and 26 showed germination inhibitory activity toward lettuce seeds (<i>Lactuca sativa</i> L. var. Great Lakes) at 100 ppm.</p>

  • Recyclable polymer-supported terpyridine–palladium complex for the tandem aminocarbonylation of aryl iodides to primary amides in water using NaN<inf>3</inf> as ammonia equivalent

    Suzuka T. Hiromu Sueyoshi, Kazuhito Ogihara

    Catalysts ( Catalysts )  7 ( 4 )   2017年04月 [ 査読有り ]

    掲載種別: 研究論文(学術雑誌)

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