Isoxazolidine and dihydropyran spiro derivatives can be easily transformed, by hydrolysis and hydrogenolysis, to give δ-keto esters, δ-keto acids, β-amino esters, β-amino acids and 3-amino alcohols in good yields. Startiing from optically active compounds enantiomerically pure products are obtained. In some cases, reactions were induced by microwave irradiation.
A. Díaz-Ortiz, E. Díez-Barra, A. de la Hoz, P. Prieto and A. Moreno, J. Chem. Soc., Perkin Trans. 1, 1996, 259 DOI: 10.1039/P19960000259
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