• 제목/요약/키워드: m-chloroperbenzoic acid

검색결과 19건 처리시간 0.023초

The Oxidative Iodination of Pyrimidine Bases and their Nucleosides using Iodine/Dimethylformamide/m-Chloroperbenzoic Acid

  • Hwang, Chang-Ho;Park, Jung-Sup;Won, Jeong-Hee;Kim, Jae-Nyoung;Ryu, Eung K.
    • Archives of Pharmacal Research
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    • 제15권1호
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    • pp.69-72
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    • 1992
  • Pyrimidine bases and their mucleosides were oxidatively iodinated at C-5 position by the reaction of iodine in DMF (dimethylformamide) with MCPBA (m-chloroperbenzoic acid) under mild conditions. For uracil derivatives such as uracil 1a. 1, 3-dimethyluracil 1b, uridine 1c, and 2'-deoxyuridine 1d, the corresponding 5-iodo derivatives were obtained in high yields (71-95%). The iodination of cytidine 3a and 2'-deoxycytidine 3b was achieved in moderate yields (41-56%).

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Cannabinoid의 할로겐화 (Halogenation of Cannabinoids)

  • 백승화;박노윤
    • 대한화학회지
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    • 제35권1호
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    • pp.59-63
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    • 1991
  • 카나비노이드의 할로겐화 반응은 metal halide와 함께 18-crown-6 존재하에 m-chloroperbenzoic acid에 의해 좋은 수득률의 산화반응이 일어났다. 이 반응계에서는 할로겐화 반응이 방향족 고리에만 선택적으로 일어났다.

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1,3-쌍극성 고리화 첨가반응에 의한 Isoxazolo[2,3-${\alpha}$]quinoxaline류와 Pyrrolo[1,2-${\alpha}$]quinoxaline류의 선택적인 합성 (A Selective Synthesis of Isoxazolo[2,3-${\alpha}$]quinoxalines and Pyrrolo[1,2-${\alpha}$]quinoxalines by 1,3-Dipolar Cycloaddition Reaction)

  • 김호식;남순화
    • 대한화학회지
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    • 제34권5호
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    • pp.469-475
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    • 1990
  • 2,6-dichloroquinoxaline (13)과 m-chloroperbenzoic acid를 반응시켜 2,6-dichloroquinoxaline 4-oxide (14)를 합성하고, 이것과 pyrrolidine 혹은 indoline을 반응시켜 2-substituted 6-chloroquinoxaline 4-oxide류(15)를 합성하였다. 그리고 이들과 dimethyl acetylenedicarboxylate를 반응시키니 isoxazolo[2,3-a]quinoxaline류(16)와 pyrrolo[1,2-a]quinoxaline류 (17)가 선택적으로 합성되었다. 더욱이 pyrrolo[1,2-a]quinoxaline류 (17)는 isoxazolo[2,3-a]quinoxaline류 (16)의 고리변환에 의하여 생성된다는 것을 알았다.

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Halogenation of Resorcinol Derivatives

  • 백승화
    • Bulletin of the Korean Chemical Society
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    • 제9권1호
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    • pp.13-15
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    • 1988
  • Several types of resocinols have been monobrominated in the ring in good yields with sodium bromide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. Monoiodination takes place with 2'-(1-methylcyclohexen-3-yl)-5-(1,1-dimethylheptyl )-resocinol when sodium iodide is employed. This new reagent system, MX/18-crown-6/m-CPBA (M =$K^+, Na^+, X = Br^-, I^-X$ ), effects the regiospecific halogenation of activated aromatic ring over olefinic double bond.

Epoxidaion of Unsaturated Poly (3-hrdroxyalkanoate)s with m-Chloroperbenzoic Acid

  • Park, Won-Ho;Robert W. Lenz;Steve Goodwin
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 1998년도 봄 학술발표회 논문집
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    • pp.45-49
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    • 1998
  • The production of unsaturated poly(3-hydroxyalkanoate)s, PHAs, by Pseudomonas oleovorans has been studied extensively in this laboratory$\^$1-3/, and recently a procedure has been developed for the quantitative conversion of the unsaturated groups to epoxide groups$^4$.(omitted)

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