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Synlett 1999; 1999(S1): 873-876
DOI: 10.1055/s-1999-3091
DOI: 10.1055/s-1999-3091
letter
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A Second-Generation Cycloaddition Route to 5-Substituted 3-Acyltetramic Acids
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Publikationsverlauf
Publikationsdatum:
31. Dezember 1999 (online)
The 1,3-dipolar cycloaddition of α-aminonitrile oxides, formed from α-amino-acids, to enamines of β-ketoesters affords 3-(1-aminoalkyl)isoxazole-4-carboxylic esters that are converted via pyrrolo[3,4-c]isoxazol-4-ones into 5-substituted 3-acetyltetramic acids.
acyltetramic acid - isoxazole - nitrile oxide - dipole - cycloaddition