Cycloaddition of Cyano-2-pyridones Bearing a Bromo or a Nitro Group

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  • ブロモまたはニトロ基を有するシアノ-2-ピリドン類の環化付加反応
  • ブロモ マタワ ニトロキ オ ユウスル シアノ 2 ピリドンルイ ノ カンカ フカ ハンノウ

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Cycloaddition of cyano-2(1H)-pyridones bearing a bromo or a nitro group at the pyridone ring with 2,3-dimethyl-1,3-butadiene carried out. Cycloaddition of 5-bromo-4-cyanopyridone gave cis- and trans-cycloadducts (isoquinolone derivative) in total yields 65%. The same reaction of 5-cyano-3-nitropyridone afforded 4-cyanodihydroisoquinolone (44%) and 4-cyanoisoquinolone (15%).

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