Diels-Alder cycloadditions of 3-phenylamino-5-bromo-2-pyrone for the synthesis of constrained α-amino acid derivatives |
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Authors: | Won-Suk Kim Jongmin Kang |
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Institution: | a Department of Chemistry, Hanyang University, Seoul 133-791, South Korea b Department of Applied Chemistry, Sejong University, Seoul 143-747, South Korea |
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Abstract: | 3-Phenylamino-5-bromo-2-pyrone undergoes facile Diels-Alder cycloadditions with various electron deficient dienophiles to afford an array of functionally rich and stereochemically defined cycloadducts in good to excellent isolated yields. Due to the electron donacity of the amine group, it only proceeds in normal electron demand D-A cycloadditions. Subsequent ring openings with NaOMe provided constrained α-amino acid derivatives. |
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Keywords: | Diels-Alder 2-Pyrone Constrained α-amino acid |
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