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2005
Esterification
O 0315
Cerium Polyoxometalate as a Reusable Catalyst for Acetylation and Formylation
Alcohols. — Esterification of primary and sterically-hindered secondary or tertiary
04- 058 of
alcohols occurs in the presence of ammonium decatungstocerate(IV) icosahydrate affording the corresponding acetates in high yields. The scope of this process is extended
by performing the acetylation of primary and secondary alcohols in acetic acid. However, tertiary alcohols, e.g. (Ic), remain unchanged by using AcOH (IV). Similarly, primary and secondary alcohols (V) can be formylated in the presence of the catalyst
whereas tertiary alcohols remain inactive. The ease of preparation of the catalyst, its
reusability without loss of activity, its stability and non-toxicity as well as the simple
work-up and short reaction times make this method a pregnant supplement to existing
ones. — (MIRKHANI*, V.; TANGESTANINEJAD, S.; MOGHADAM, M.;
YADOLLAHI, B.; ALIPANAH, L.; Monatsh. Chem. 135 (2004) 10, 1257-1263;
Dep. Chem., Isfahan Univ., Isfahan 81746, Iran; Eng.) — H. Hoennerscheid
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