• 제목/요약/키워드: Chemical coupling

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Zinc Mediated Barbier Type Allylation of Cyclic Imides and Subsequent Coupling Reactions with Carbon Nucleophiles

  • Kang, Seok-Won;Heo, Eun-Young;Jun, Jong-Gab;Kim, Sung-Hoon
    • Bulletin of the Korean Chemical Society
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    • 제25권12호
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    • pp.1924-1928
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    • 2004

  • Allylations of N-benzyl and N-methyl cyclic imides were accomplished successfully under mild Barbier type conditions using zinc metal, allyl bromide and catalytic amount of $PbBr_2$. Subsequent coupling reactions with some carbon nucleophiles afforded 1,2- and 1,4-addition products in moderate to high yields.

  • https://doi.org/10.5012/bkcs.2004.25.12.1924 인용 PDF KSCI

Spin-Rotational Relaxation of a Nuclear Spin on an Internal Rotor

  • Jo-Woong Lee
    • Bulletin of the Korean Chemical Society
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    • 제4권1호
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    • pp.48-54
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    • 1983

  • A magnetic nucleus located on an internal rotor can interact with magnetic fields arising from end-over-end molecular rotation as well as internal rotation. In this paper the expressions for spin-rotational relaxation times, $T_{1.SR}\;and\;T_{2.SR}$, are derived for such nucleus with the anisotropy of molecular rotation explicitly taken into consideration. The derived expressions are shown to be composed of two parts, the contribution from spin-overall-rotation coupling and that from spin-internal-rotation coupling. Some remarks on the use of derived expressions are also provided.

  • https://doi.org/10.5012/bkcs.1983.4.1.48 인용 PDF