• Title/Summary/Keyword: Pd-catalyzed

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Synthesis of 14-Membered Phenylthio Enediyne Lactone : A Precursor of the Potential Enediyne Antitumor Antibiotics (항암작용 가능성이 있는 10-Membered Enediyne의 선구물질인 14-Membered Phenylthio Enediyne Lactone의 합성)

  • Kim, Kee Dong
    • Journal of the Korean Chemical Society
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    • v.39 no.2
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    • pp.103-110
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    • 1995

  • Phenylthio substituted 14-membered lactone(23) which can serve as a precursor of a potential antitumor antibiotics (6), was successfully prepared. The synthesis of the lactone was accomplished via lactonization of the corresponding enediyne hydroxy acid (22). This hydroxy acid was derived from Pd(0)-catalyzed coupling reaction of methyl pentynoate and cis-1,2-dichloroethylene followed by another Pd(0)-catalyzed coupling reaction of the resulting methyl chloroenyne ester (20) and enyneol (17). The required enyne alcohol was successfully synthesized from vinyltin compound (12) in good overall yield.

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Pd-Catalyzed Oxidative Arylation of Cinnamylphosphonates: An Efficient Synthesis of (Z)-Alkenylphosphonates

  • Lee, Hyun Seung;Lim, Cheol Hee;Lee, Hyun Ju;Kim, Jae Nyoung
    • Bulletin of the Korean Chemical Society
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    • v.33 no.11
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    • pp.3817-3822
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    • 2012

  • Various alkenylphosphonates were prepared via the palladium-catalyzed oxidative arylation of cinnamylphosphonates with arenes. The regioselectivity during the ${\beta}$-H elimination of the corresponding alkylpalladium intermediate was governed most likely by steric factors.

  • https://doi.org/10.5012/bkcs.2012.33.11.3817 인용 PDF KSCI

Synthesis of Dimeric Oligodeoxyribonucleotide (이합체성 올리고디옥시리보핵산의 합성)

  • Song, Jeong-Sup
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.6
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    • pp.1566-1571
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    • 2007

  • Oligodeoxyribonucleotide bearing the di-acetylenic linkage has been prepared. Staring from 5-Iodo-2'-deoxyuridine(1), a four-step sequence, consisting of the Pd(0)-catalyzed Heck-type C-C coupling with acetylenic group, protection of 5'-hydroxy group, generation of acetylenic hydrogen, and Glaser oxidative coupling reaction leads to the dimeric oligodeoxyribonucleotide(5).

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Effect of Plasma Etching and $PdCl_2/SnCl_2$ Catalyzation on the Performance of Electroless Plated Copper Layer (플라즈마 에칭 및 $PdCl_2/SnCl_2$ 촉매조건이 무전해 동도금 피막의 성능에 미치는 영향)

  • 오경화;김동준;김성훈
    • Journal of the Korean Society of Clothing and Textiles
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    • v.27 no.7
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    • pp.843-850
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    • 2003

  • Cu/PET film composites were prepared by electroless copper plating method. In order to improve adhesion between electroless plated Cu layer and polyester (PET) film, the effect of pretreatment conditions such as etching method, mixed catalyst composition were investigated. Chemical etching and plasma treatment increased surface roughness in decreasing order of Ar＞HCl＞O$_2$＞NH$_3$. However, adhesion of Cu layer on PET film increased in the following order: $O_2$＜Ar＜HCl＜NH$_3$. It indicated that appropriate surface roughness and introduction of affinitive functional group with Pd were key factors of improving adhesion of Cu layer. PET film was more finely etched by HCI tolution, resulting in an improvement in adhesion between Cu layer and PET film. Plasma treatment with NH$_3$produced nitrogen atoms on PET film, which enhances chemisorption of Pd$^{2+}$ on PET film, resulting in improved adhesion and shielding effectiveness of Cu layer deposited on the Pd catalyzed surface. Surface morphology of Cu plated PET film revealed that Pd/Sn colloidal particles became more evenly distributed in the smaller size by increasing the molar ratio of PdCl$_2$; SnCl$_2$from 1 : 4 to 1 : 16. With increasing the molar ratio of mixed catalyst, adhesion and shielding effectiveness of Cu plated PET film were increased.d.

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