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Showing 1 to 11 of 11 for “"cyclohexenone"”.
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Enantioselective Conjugate Additions to a Hindered Cyclohexenone System
… subjected the 4,4-disubstituted-2-carboxamide-2-cyclohexenone Birch-Cope products to carbon nucleophile conjugate additions to enantioselectively generate vicinal quaternary-tertiary stereocenters. Intermolecular conjugate additions were studied extensively but were unfortunately limited in …
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Development of oxygenase biocatalysts for the production of synthetically useful cis-diol compounds
… and meta-substituted phenols by TDO produce cyclohexenone cis-diols. The keto group of cyclohexenone cis¬-diol tautomers increases the functionalisation and stability compared to other arene cis-dihydrodiols. (4S,5S)-dihydroxy-3-iodocyclohexe-2-en-1-one, formed from 3-iodophenol by the …
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ΟΞΕΙΔΩΤΙΚΕΣ ΑΝΤΙΔΡΑΣΕΙΣ ΣΥΜΠΛΟΚΩΝ ΠΑΛΛΑΔΙΟΥ ΕΠΙ ΟΛΕΦΙΝΩΝ
… AND OR METHANE SULFONIC AND) GIVES CYCLOHEXENONE AND A MIXTURE OF CYCLOOCTENOLE AND CYCLOOCTANONE FOR CYCLOHEXENE AND CYCLOOCTENE RESPECTIVELY. REACTION OFOLEFINS WITH PDO2(PPH3)2 IN THE PRESENCE OF LEWIS' ACIDS (BF3.EE2O, ALCL3) GIVES LACTONES AND POLYMERIC OXIDATION COMPOUNDS AS …
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The Preparation of: 1. 1-(p-Methoxyphenyl)-2,6-dicarbethoxy-5-amino-cyclohexenone-3. 2. 1-(p-Methoxyphenyl)-2,6-dicarbethoxy-4-cinnamoyl-cyclohexane-dione-3,5. 3. diidodo derivative of 1-(p-Hydroxyphenyl)-2,6-dicarbethoxy-cyclohexane-dione-3,5.
For this type of reaction to tabs place, the methylene group requires the activating influence of an adjacent CC, -CN, or -NO2 grouping. A heterocyclic, or an aromatic group, or a conjugated system have the same effect.
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Synthesis and application of chiral phosphorous triamide ligands
… Cu catalysed Michael-addition of diethyl zink to cyclohexenone where enantioselectivity values up to 60% have been achieved. Good conversions, selectivities and promising enantioselectivity of 63% was attained in the Ni catalysed hydrovinylation of styrene at relatively high reaction temperature. …
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Estudio del comportamiento fotoquímico y electroquímico de yodoalquenos
… of seleno- and thioenaminones derived from cyclohexenone to act as sunscreens is examined as well. The conclusions of the dissertation are summarized in chapter 7. In chapter 8, material and methods employed in mechanistic and experimental studies are detailed.
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Investigations on the Reaction Mechanism of Xenobiotic Reductase A
… reduction of various substrates, including 2-cyclohexenone, coumarin, 7- and 8-hydroxycoumarin in a two-step mechanism consisting of a reductive and an oxidative half-reaction. The overall structure of the family members is similar but the active site residues show considerable variations. One …
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Palladium -catalyzed synthesis of carbazole derivatives and formal total syntheses of several naturally occurring carbazole alkaloids
… in 95% yield. Methyl-substitution on the cyclohexenone ring regioselectively produced methyl-substituted tetrahydrocarbazoles, however substitution on the benzene ring led to mixtures of carbazole products.
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Methods in Total Synthesis: Development of a 2nd-Generation Synthesis of CJF-III-288, and Synthetic Efforts Towards the Total Synthesis of Sequoiamonascin A
… tactic. The construction of the α,β-unsaturated cyclohexenone scaffold for the proposed radical-relay tactic proved to be more challenging than anticipated. While the proposed tactic has merit, improving the yield of the beginning portion of the synthesis is crucial to ensuring sufficient …
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Design and synthesis of novel non peptidomimtic beta-secretase inhibitors in the treatment of Alzheimer's disease
… asymmetric conjugate addition of nitroalkanes to cyclohexenone in presence of D-proline and trans-2,5-dimethylpiperazine. The enantioenriched obtained 3-(α-nitroalkyl)-cyclohexanones were further functionalized to give the corresponding δ-nitroalkyl cyclohexane carboxylic acids. These …
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Mechanistic Investigations of Hydrogen and Oxygen Atom Transfer Reactions by Manganese-Oxygen Species
… allylic C–H bonds, resulting in cyclohexenol and cyclohexenone formation. DFT computations successfully established a trend in thermodynamic properties of the manganese(IV)-oxo complexes and their reactivity towards olefin oxidation on the basis of the Mn=O bond dissociation free energy (BDFE). …