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2005
Reduction
O 0220
22- 048
Zr(Ot-Bu)4-Catalyzed Tishchenko Reduction of β-Hydroxy Ketones. —
Zr(Ot-Bu)4 is used as an effective catalyst for the Tishchenko reduction of β-hydroxy
ketones to afford 1,3-anti-diol monoesters. Treatment of (IV) with isobutyraldehyde results in formation of a mixture of Tishchenko products; the ratio depends on the reaction temperature. For the anti-aldol educt (VII), a ratio of nearly 1:1 is observed due to
epimerization. — (SCHNEIDER*, C.; KLAPA, K.; HANSCH, M.; Synlett 2005, 1,
91-94; Inst. Org. Chem., Univ. Leipzig, D-04103 Leipzig, Germany; Eng.) —
S. Adam
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