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Selective Reduction of Dimedone
DSM Nutritional Products Ltd., Research and Development, P.O Box 2676, 4002 Basel, Switzerland
* Author to whom correspondence should be addressed.
Received: 30 March 2009; Accepted: 13 May 2009 / Published: 14 May 2009
Abstract: The selective hydrogenation of dimedone (1) to the corresponding monoketone 2 over palladium and Amberlyst 15® is reported. The product is a synthetic building block for the fragrance and pharmaceutical industry. Advantages of the new catalytic procedure are the high catalyst activity and selectivity, less by-product formation, avoidance of the presence of acid, and consequently, less salt formation due to the omission of a neutralization step. Using a substrate/catalyst ratio of >100 compound 2 can be synthesized in 97% yield at full conversion. Recycling of the catalyst several times has been shown to be feasible without any detectable decrease in selectivity.
Keywords: heterogeneous catalysis; ion exchange resins; selective hydrogenation; 1; 3-diketones
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MDPI and ACS Style
Létinois, U.; Bonrath, W. Selective Reduction of Dimedone. Sustainability 2009, 1, 209-214.
Létinois U, Bonrath W. Selective Reduction of Dimedone. Sustainability. 2009; 1(2):209-214.
Létinois, Ulla; Bonrath, Werner. 2009. "Selective Reduction of Dimedone." Sustainability 1, no. 2: 209-214.