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δ-Pyronene, a terpenic synthon recently made industrially available from myrcene, has been characterized. It is an excellent raw material for the preparation of numerous intermediates used in the synthesis of perfumes and retinoids. Furthermore, new terpenic compounds including the cyclogeranyl skeleton have been prepared.
- Quirin, Marie Jeanne,Taran, Martine,Delmond, Bernard
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p. 1852 - 1856
(2007/10/03)
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- Epoxy-pyronene: Obtention of cyclocitrals from ionones and precursor of new terpenic compounds
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The selective obtention of epoxy-pyronene from δ-pyronene has been realized using metachloroperbenzoic acid. The isomerization of this epoxidic compound with Lewis and protonic acids and on active alumina has been studied leading to cyclocitrals. Ionones are obtained from epoxy-pyronene by homologation with various C3 units, in the presence of paratoluenesulfonic acid in order to obtain β-cyclocitral in situ. New terpenic compounds with the cyclogeranyl skeleton were obtained from epoxy-pyronene by reduction followed by homologation.
- Marc,Soulet,Serramedan,Delmond
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p. 3381 - 3388
(2007/10/02)
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The selective obtention of epoxides from delta-pyronene has been realized using a peracid and a cyclodehydrohalogenation reaction. The isomerization of an epoxidic isomer with Lewis and protonic acids and on active alumina has been studied leading to cyclocitrals.
- Serramedan
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p. 4457 - 4460
(2007/10/02)
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- Cyclic ketones and their use as perfuming ingredients
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Novel compounds of formula STR1 wherein the dotted lines indicate the location of a single or double bond, symbol R1 stands for a hydrogen atom or a methyl radical, symbol R2 represents a linear or branched, saturated or unsaturated, C1 to C4 alkyl radical, provided that R1 is not hydrogen when R2 represents a methyl or n-propyl radical and the ring is saturated. Compounds (Ia) are useful as perfuming ingredients. A process for their preparation is disclosed.
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