56208-30-1Relevant articles and documents
Cyclamen aldehyde synthesis: Aldol condensation followed by hydrogenation over ruthenium catalyst
Vrbkov, Eva,Skpala, Tom,Vyskoilov, Elika,erven, Libor
, p. 9195 - 9205 (2015)
Cyclamen aldehyde is a fragrant substance with the scent of cyclamen or lily-of-the-valley. In this work, the desired cyclamen aldehyde was prepared by twostep synthesis. At the first step, aldol condensation of 4-isopropylbenzaldehyde and propanal was carried out. The influence of used catalyst (potassium hydroxide and sodium methoxide) and propanal amount were tested. Propanal was used in excess and it was added to the reaction mixture dropwise (to prevent its self-condensation to 2-methylpent-2-enal). Resulting mixture of 4-isopropylbenzaldehyde and forcyclamen aldehyde was hydrogenated using different Ru/C catalysts. The products detected in hydrogenation reaction mixture were: desired cyclamen aldehyde, cyclamen alcohol and forcyclamen alcohol. The influence of catalyst type and amount, reaction temperature and hydrogen pressure on the reaction course was tested. The highest yield (19.4 %) was obtained using pressure 10 MPa, temperature 110 °C and 2 wt% of catalyst Ru/C.
PROMOTERS FOR THE PROLIFERATION AND DIFFERENTIATION OF STEM CELLS AND/OR NEURON PRECURSOR CELLS
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, (2008/06/13)
An agent for promoting the proliferation or differentiation of a stem cell and/or neural progenitor cell, comprising a compound represented by Formula: wherein each of R1 and R2 is H, a hydrocarbon group or a heterocyclic group, or taken together with the adjacent carbon atom to form a ring, R3 is H, a hydrocarbon group or a heterocyclic group, W is a group represented by Formula: wherein Ring A is an optionally substituted benzene ring, Ring B is an optionally substituted 5- to 7-membered nitrogen-containing heterocyclic ring, R4 is an acyl group having an aliphatic hydrocarbon group, which is substituted by an aromatic group and may have a further substitutent, or aromatic group, R5 is H, C1-6 alkyl or acyl, R4c is an aromatic group, an aliphatic hydrocarbon group or acyl, and X is O or S; Y is O, S or NH, Ring C is an optionally substituted benzene ring, or a salt or prodrug thereof is provided.
From allylic alcohols to saturated carbonyls using Fe(CO)5 as catalyst: Scope and limitation studies and preparation of two perfume components
Cherkaoui, Hassan,Soufiaoui, Mohammed,Grée, René
, p. 2379 - 2383 (2007/10/03)
The direct conversion of allylic alcohols to saturated carbonyls, using Fe(CO)5 as a catalyst, offers good synthetic potential. Mono-, di- and even trisubstituted alkenes bearing various alkyl, aryl and electronwithdrawing groups on the allylic system give good to excellent yields of rearranged products. Limitations occur mainly with polyunsaturated derivatives. This reaction was applied to a short and efficient synthesis of cyclamen aldehyde and foliaver.