scholarly journals Crossed Aldol Condensation (CAC) as a Feasible Route for Synthesis of a 1, 2-Unsaturated Carbonyl Compound-1,3 Diphenylpropenone

2017 ◽  
Vol 01 (01) ◽  
Author(s):  
Deepak Chowrasia ◽  
Nisha Sharma
Keyword(s):  
Carbonyl Compound ◽  
Aldol Condensation ◽  
Unsaturated Carbonyl Compound

scholarly journals Laccase-Catalyzed Oxidation of Allylbenzene Derivatives: Towards a Green Equivalent of Ozonolysis

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 6053
Author(s):  
Mathilde Lecourt ◽  
Giorgiana Chietera ◽  
Bernard Blerot ◽  
Sylvain Antoniotti
Keyword(s):  
Double Bond ◽  
Carbonyl Compound ◽  
Conversion Rate ◽  
Methyl Eugenol ◽  
Allylic Alcohol ◽  
Side Chain ◽  
Oxidation Reactions ◽  
Electronic Effects ◽  
Unsaturated Carbonyl Compound ◽  
Catalyzed Oxidation

Laccase-based biocatalytic reactions have been tested with and without mediators and optimized in the oxidation of allylbenzene derivatives, such as methyl eugenol taken as a model substrate. The reaction primarily consisted in the hydroxylation of the propenyl side chain, either upon isomerization of the double bond or not. Two pathways were then observed; oxidation of both allylic alcohol intermediates could either lead to the corresponding α,β-unsaturated carbonyl compound, or the corresponding benzaldehyde derivative by oxidative cleavage. Such a process constitutes a green equivalent of ozonolysis or other dangerous or waste-generating oxidation reactions. The conversion rate was sensitive to the substitution patterns of the benzenic ring and subsequent electronic effects.

Excited states of acrolein: abinitio model studies on α,β-unsaturated carbonyl compounds

1982 ◽  
Vol 60 (5) ◽  
pp. 601-606 ◽  
Author(s):  
Katherine Valenta ◽  
Friedrich Grein
Keyword(s):  
Excited State ◽  
Excited States ◽  
Carbonyl Compound ◽  
Carbonyl Compounds ◽  
Excitation Energies ◽  
Vertical Excitation ◽  
Model Studies ◽  
Unsaturated Carbonyl Compound ◽  
Vertical Excitation Energies

As an explanation of the stereochemistry of photoaddition between α,β-unsaturated carbonyl compounds and olefins, Wiesner suggested that the excited state of the α,β-unsaturated carbonyl compound is pyramidal at the β-carbon. It is shown by abinitio SCF and CI studies that for acrolein in the 1nπ*, 3nπ*, and 3ππ* excited states the β-carbon remains planar. In addition, vertical excitation energies for the 1nπ* and 1ππ*, and adiabatic excitation energies for the 1nπ* and 3nπ* states of trans-acrolein have been calculated.

Lithium Acetate-Catalyzed Michael Reaction Between Trimethylsilyl Enolate and α,β-Unsaturated Carbonyl Compound.

ChemInform ◽  
2005 ◽  
Vol 36 (1) ◽  
Author(s):  
Takashi Nakagawa ◽  
Hidehiko Fujisawa ◽  
Yuzo Nagata ◽  
Teruaki Mukaiyama
Keyword(s):  
Carbonyl Compound ◽  
Michael Reaction ◽  
Lithium Acetate ◽  
Unsaturated Carbonyl Compound
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