58102-12-8Relevant academic research and scientific papers
EPOXYDATION EN MILIEU HETEROGENE SOLIDE-LIQUIDE: EFFET DES INTERACTIONS A L'INTERFACE SUR LA STABILITE DE L'YLURE DE DIMETHYLSULFONIUM - CONSEQUENCES SUR LA STEREOCHIMIE DE LA REACTION D'EPOXYDATION
Borredon, Elisabeth,Delmas, Michel,Gaset, Antoine
, p. 1877 - 1880 (2007/10/02)
The use of solid-liquid heterogenous system in a low hydrated organic medium during the epoxidation reaction of rigid cyclohexanones stabilizes the dimethylsulfonium ylide.The stereochemistry of the reaction is then modified and results to be different from the one obtained in an anhydrous homogeneous medium.However the ylide stability is not sufficient to lead to a cyclopropyl by-product with the α-ionone.
175. The Synthesis of β,γ- and α,β-Unsaturated Aldehydes via Polyene Epoxides
Rosenberger, Michael,Jackson, William,Saucy, Gabriel
, p. 1665 - 1674 (2007/10/02)
A substitute for the Darzens glycidic ester synthesis for converting unsaturated ketones or aldehydes into the homologated β,γ- or α,β-unsaturated aldehydes employing sulfur ylides is desribed.The carbonyl group is converted into the unsaturated oxirane which is then rearranged to the new aldehyde.High yields of isomerically pure aldehydes are available by this method and the process is of practical importance in the conversion of β-ionone into the β-C14-aldehyde, a key intermediate in the Isler synthesis of vitamin A.The efficient preparation of α- and β-cyclocitral by the novel process is also described.
Novel odorants
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, (2008/06/13)
Novel odorants of the formulae: STR1 wherein R1 represents a hydrogen atom or a methyl group and R2 represents a C1-6 alkyl group and wherein one of the two additional bonds indicated by dots may be present.
