• Title/Summary/Keyword: dibromantin

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Practical Hofmann Rearrangement

  • Jew, Sang-Sup;Park, Hyeung-Geun;Kang, Myoung-hee;Lee, Tae-hee;Cho, Youn-sang
    • Archives of Pharmacal Research
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    • v.15 no.4
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    • pp.333-335
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    • 1992
  • Hofmann rearrangement of a series of primary aliphatic and aromatic carboxamides 1a-1m with HgO-NBS (or dibromantin)R'OH-DMF gives corresponding carbamates 2a-2m in excellent yields.

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Bromolactonization of 2-Substituted-1-Cyclohexenyl-1-acetic acid (2-치환-1-Cyclohexenyl-1-acetic acid의 브롬락톤화 반응)

  • Jew, Sang-Sup
    • YAKHAK HOEJI
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    • v.33 no.3
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    • pp.206-210
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    • 1989
  • Bromolactonization of 2-Substituted-1-cyclohexenyl-1-acetic acid (1) with 1,3-dibromo-5,5-dimethylhydantoin (dibromantin) in N,N-dimethylformamide gave the corresponding ${\gamma}-bromo-{\beta}-lactone$ (2) and ${\beta}-bromo-{\gamma}-lactone$ (3). The effect of the substituents, the reaction temperature, and the solvent on the regioselectivity was discussed.

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