- Silica-supported dendrimer-palladium complex-catalyzed selective hydrogenation of dienes to monoolefins
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The selective hydrogenation of cyclic and acyclic dienes to monoolefins occurs under very mild conditions, in the presence of silica-supported PAMAM-Pd complexes. The activity and selectivity of this reaction is sensitive to the dendrimer structure. These dendritic complexes display excellent recycle properties, retaining activity for up to eight recycles.
- Zweni, Pumza P.,Alper, Howard
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p. 725 - 731
(2007/10/03)
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- "Syn-effect" in the conversion of (e)-α,β-unsaturated esters into the corresponding β,γ-unsaturated esters and aldehydes into silyl enol ethers
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The stereochemistry in the conversion of (E)-α,β-unsaturated esters into the corresponding β,γ-unsaturated esters, and that in the conversion of aldehydes into the silyl enol ethers, were investigated. The Z/E ratios of the resulting β,γ-unsaturated ester
- Guha, Samar Kumar,Shibayama, Atsushi,Abe, Daisuke,Sakaguchi, Maki,Ukaji, Yutaka,Inomata, Katsuhiko
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p. 2147 - 2157
(2007/10/03)
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- A Note on Stereochemical Observation of the Deprotonation of Ethyl-2-Alkenoates
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Deprotonation of ethyl (E)-2-alkenoates 1, 3 and 4 yields after protonation the double bond migrated (3 Z)-isomers 5, 7 and 9 as major products.In contrast, deprotonation and reprotonation of ethyl (Z)-2-pentanoate (2) gives the (3 E)-isomer 6 exclusively
- Krebs, Ernst-Peter
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p. 1023 - 1025
(2007/10/02)
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