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Unsymmetrical Unsaturated Ketones from Lactones and Carboxylic Acids in One Step.

✍ Scribed by Wolfgang Giersch; Ferdinand Naef

Publisher
John Wiley and Sons
Year
2004
Weight
23 KB
Volume
35
Category
Article
ISSN
0931-7597

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Unsymmetrical Unsaturated Ketones from L
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## Abstract A one‐step transformation of __γ__‐ and __δ__‐(spiro)lactones into __γ__,__δ__‐ and __δ__,__ε__‐unsaturated ketones in the presence of carboxylic acids in the vapor phase at 400° over a supported manganese catalyst is reported for the first time. The scope of this new transformation is

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## Abstract A one‐step transformation of __γ__‐ and __δ__‐(spiro)lactones into __γ__,__δ__‐ and __δ__,__ε__‐unsaturated aldehydes with an excess of formic acid in the vapor phase over a supported manganese catalyst is described for the first time. The scope and limitations of this new reaction are