• 제목/요약/키워드: amination

검색결과 125건 처리시간 0.021초

A General Strategy for the Synthesis of Amino-Substituted 2-Pyridones Using a Palladium-Catalyzed Amination Reaction

  • Kim, Young-Ha;Kim, Yeong-Joon;Chang, Sung-Youn;Kim, Bum-Tae;Heo, Jung-Nyoung
    • Bulletin of the Korean Chemical Society
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    • 제28권5호
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    • pp.777-782
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    • 2007
  • A novel library of amino-substituted 2-pyridones has been constructed through a two-step sequence of microwave-promoted Buchwald-Hartwig amination of 2-benzyloxy halopyridines followed by debenzylation. Microwave-promoted amination of 3- or 4-halopyridine in the presence of a suitable palladium catalyst and ligand system provided amino-substituted 2-benzyloxypyridines in excellent yields. Then, debenzylation of 2- benzyloxypyridines afforded the corresponding 2-pyridones with high efficiency.

One-Pot Reductive Amination of Carbonyl Compounds Using Sodium Borohydride-Cellulose Sulfuric Acid

  • Alinezhad, Heshmatollah;Tollabian, Zakieh
    • Bulletin of the Korean Chemical Society
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    • 제31권7호
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    • pp.1927-1930
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    • 2010
  • A fast, efficient, and high yielding method for the preparation of amines by reductive amination of aldehydes and ketones using sodium borohydride in the presence of cellulose sulfuric acid in EtOH and under solvent-free conditions at room temperature is described.

구리 촉매에 의한 할로젠화 아릴과 아지도 소듐의 선택적 아지드화 및 아민화 반응 (Selective Copper-Catalyzed Azidation and Amination of Aryl Halides with Sodium Azide)

  • 백승욱
    • 공업화학
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    • 제32권2호
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    • pp.224-227
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    • 2021
  • A rapid and selective copper-catalyzed amination of aryl halides with sodium azide was established by using 10 mol % of CuI, and 20 mol % of N,N'-dimethylethylenediamine in DMSO under microwave irradiation for 10 min. The catalytic system with 4-substituted aryl iodides was found to be the most effective leading to a nearly complete conversion.

Effect of Amination on the Biological Activity of $\beta$-Glucan from Sangwhang (Phellinus linteus)

  • Bae, In-Young;Shin, Ji-Yoon;Lee, Hyeon-Gyu
    • Food Science and Biotechnology
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    • 제17권3호
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    • pp.683-686
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    • 2008
  • $\beta$-Glucans, which were isolated from sangwhang (Phellinus linteus), were subjected to reductive amination and the biological properties of the derivative were investigated. The degree of substitution of the aminated sangwhang $\beta$-glucan was calculated by elemental analysis to be 1.13. Bronchoalveolar lavage (BAL) experiments showed that the aminated derivative increased nitric oxide production. In addition, the amination enhanced in vitro cytotoxic activities against HT1080 and SNU-C2A cell lines. Thus, the aminated derivative is shown to enhance immune systems by the incorporation of amino groups into the polymer structure.