• 제목/요약/키워드: Suzuki coupling

검색결과 67건 처리시간 0.03초

팔라듐 나노입자가 담지된 메조포러스 실리카의 제조와 이를 이용한 Suzuki Cross-Coupling 반응의 적용연구 (Synthesis of Palladium Nanoparticles Encapsulated in Phosphine Ligand-Grafted Mesoporous Silicas and Their Application to Suzuki Cross-Coupling Reaction)

  • 김상욱;주진
    • 청정기술
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    • 제17권1호
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    • pp.13-18
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    • 2011
  • 포스핀(phosphine) 리간드(ligand)가 도포된 메조포러스 실리카(mesoporous silicas)에 팔라듐 나노입자를 도입하여 새로운 팔라듐(Pd) 불균일 촉매(heterogeneous catalyst)를 제조하였다. 제조된 촉매는 브롬화벤젠 유도체(bromobenzene derivatives)들의 Suzuki cross-coupling 반응에 대하여 뛰어난 촉매활성을 나타내었고 촉매를 두 번째 사용하였을 때는 수율이 감소하였다.

Tris(2-methoxyphenyl)phosphine as a Highly Active Ligand for the Synthesis of Biaryls by Suzuki Coupling Reaction

  • Kang, Pill-Seong;Ko, Sung-Bo;Ko, Jang-Myoun;Park, Jeong-Ho
    • Bulletin of the Korean Chemical Society
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    • 제30권11호
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    • pp.2697-2700
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    • 2009
  • A $Pd(OAc)_2/(o-MeOPh)_3P$ system has been developed for the catalytic Suzuki coupling of aryl bromides with arylboronic acids. Our catalyst system covers a broad spectrum of commonly available arylboronic acids and aryl bromides to provide biaryls in very good yields. The catalyst system works very well in the synthesis of sterically hindered biaryls.

Heterogeneous Suzuki Cross-Coupling Reaction Catalyzed by Magnetically Recyclable Nanocatalyst

  • Choi, Kwang-Hyun;Shokouhimehr, Mohammadreza;Sung, Yung-Eun
    • Bulletin of the Korean Chemical Society
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    • 제34권5호
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    • pp.1477-1480
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    • 2013
  • The Suzuki cross-coupling reactions proceeded in excellent yields when it was catalyzed by magnetically recyclable nanocatalyst. This nanocatalyst provided very high catalytic activity with low loading level (1 mol %), because the palladium nanoparticles were so small in size (~2 nm) and located on the surface of the nanocomposite. It was also easily recovered from the reaction mixture using a magnet and reused for six consecutive cycles.

Synthesis of Neopentyl Biphenylsulfonates Using the Suzuki-Miyaura Reaction

  • Cho, Chul-Hee;Kim, Chul-Bae;Sun, Myung-Chul;Park, Kwang-Yong
    • Bulletin of the Korean Chemical Society
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    • 제24권11호
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    • pp.1632-1636
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    • 2003
  • Palladium-catalyzed cross-coupling reactions of neopentyloxysulfonylphenyl bromides with arylboronic acids provided a variety of neopentyl biphenylsulfonates in good yields. 2-Bromo- and 4-bromobenzenesulfonates underwent the coupling reaction more rapidly than 3-bromobenzenesulfonate, while chlorobenzenesulfonate did not produce the coupling product under the standard reaction conditions.

Cross-Coupling Reaction of 2-halo1-methyl-1H-imidazo[4,5-b]pyridine Offers a New Synthetic Route to Mutagenic Heterocyclic Amine-PHIP and DMIP

  • Sajith, Ayyiliath M.;Muralidharan, Arayambath;Karuvalam, Ranjith P.;Haridas, Karickal R.
    • 대한화학회지
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    • 제57권3호
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    • pp.361-364
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    • 2013
  • A modified synthetic approach to the synthesis of heterocyclic food mutagens, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PHIP) and 2-amino-1,6-dimethylimidazo[4,5-b]pyridine (DMIP) is reported. This route highlights an optimized palladium catalysed Buchwald cross-coupling of 2-halo-1-methyl-imidazo[4,5-b]pyridine with benzophenoneimine followed by acidic hydrolysis to yield compound 7. Using finely tailored conditions, Suzuki cross-coupling reactions with highly efficient catalytic systems were performed as the final step on 8 to introduce the aryl group and methyl group on the heterocyclic core.