• Title/Summary/Keyword: palladium catalyzed cyclization

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Palladium-Catalyzed Cross-Coupling Reaction and Gold-Catalyzed Cyclization for Preparation of Ethyl 2-Aryl 2,3-Alkadienoates and α-Aryl γ-Butenolides

  • Mo, Jun-Tae;Hwang, Hoon;Lee, Phil-Ho
    • Bulletin of the Korean Chemical Society
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    • v.32 no.spc8
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    • pp.2911-2915
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    • 2011

  • Efficient synthetic method for the preparation of ethyl 2-aryl-2,3-alkadienoates through Pd-catalyzed selective allenyl cross-coupling reactions of aryl iodides with organoindiums generated in situ from indium and ethyl 4-bromo-2-alkynoate was developed. The cyclization reaction of ethyl 2-aryl-2,3-alkadienoates catalyzed by $AuCl_3$ and AgOTf in the presence of AcOH or TfOH produced various ${\alpha}$-aryl ${\gamma}$-butenolides or ${\gamma}$-substituted ${\alpha}$-aryl ${\gamma}$-butenolides.

  • https://doi.org/10.5012/bkcs.2011.32.8.2911 인용 PDF KSCI

Chemical Reactions in Solid State Complexes of 1,2-Polybutadiene and Palladium Chloride : High Temperature Infrared Study

  • Lee, Joon Y.;Laurence A. Belfiore
    • Bulletin of the Korean Chemical Society
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    • v.17 no.9
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    • pp.826-830
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    • 1996

  • Fourier transform infrared (FTIR) temperature studies were performed to examine the microstructural changes that occur in annealing process of the thin films of 1,2-polybutadiene (1,2-PBu)/palladium chloride (PdCl2) complex. The disappearance of the infrared absorption intensities at 1640, 1418, 994 and 910 cm-1 signifies the consumption of 1,2-vinyl groups of 1,2-PBu. The progressive loss of unsaturation and production of methyl groups as a function of temperature were identified by the enhanced infrared absorption intensities at 1447 and 1375 cm-1. The loss of pendent carbon-carbon double bond is considered to involve both palladium-catalyzed addition reaction and thermally induced cyclization.

  • https://doi.org/10.5012/bkcs.1996.17.9.826 인용 PDF

Carbonylative Cyclization of Unsaturated Carboxylic Acids by Palladium Complexes with Phosphines [III] Palladium (0, II)-Phosphine Complexes Catalyzed Cabonylation of Unsaturated Carboxylic Acids and It's Theoretical Studies (포스핀류가 배위된 팔라듐 착물에 의한 불포화카르복실산의 카르보닐화 고리반응 (제 3 보). 팔라듐 (0, II)-포스핀계 착물에 의한 불포화카르복실산의 카르보닐화 반응 및 그의 이론적 연구)

  • Myung-Ki Doh;Bong-Gon Kim;Maeng-Jun Jung;Young-Dae Song;Park Byung-Kak
    • Journal of the Korean Chemical Society
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    • v.37 no.10
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    • pp.903-909
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    • 1993

  • Reaction mechanism of palladium(0, II)-phosphines complexes catalyzed cyclocarbonylation for unsaturated carboxylic acid such as crotonic acid, methacrylic acid and 3-butenoic acid has been investigated by product analysis, molecular mechanics and extended Huckel molecular orbital method. Reaction of 3-butenoic acid with palladium(0, II)-phosphines catalyst gives palladium containing cycloester through intermediate palladium-olefin ${\pi}$ -complex in the catalytic carbonylation. Palladium(0, II)-phosphines complexes catalyze the cyclocarbonylation of 3-butenoic acid to give 3-methylsuccinic anhydride and glutaric anhydride. But ${\pi}$ -complexes with palladium(0, II)-phosphines and unsaturated carboxylic acids such as crotonic acid and methacrylic acid are not effective the catalytic cyclocarbonylation.

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