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2004
Oxazole derivatives
R 0220
O-Protected 3-Hydroxy-oxazolidin-2,4-diones: Novel Precursors in the Synthesis
of α-Hydroxyhydroxamic Acids. — Title compounds of type (IV) are prepared in a
47- 120 one-pot
procedure from cyanohydrins, CDI and the appropriate hydroxylamines. They
are used as novel precursors for the synthesis of α-hydroxyhydroxamic acids. Decarboxylation of (IV) is accomplished under mild conditions in the presence of different
bases. Subsequent deprotection results in formation of final α-hydroxyhydroxamic
acids. Deprotection of (Vc) leads to isolation of (VII). — (KURZ*, T.; WIDYAN, K.;
Org. Biomol. Chem. 2 (2004) 14, 2023-2027; Inst. Pharm., Univ. Hamburg,
D-20146 Hamburg, Germany; Eng.) — S. Adam
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