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US 2009/0263336 A1Published application
Novel pyran derivatives and their preparation
AssigneeV. Mane Fils
InventorsJean MANE, Caroline PLESSIS, Jean-Jacques CHANOT
Life of this patent
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Abstract
A process of preparing a compound of formula (I) wherein R represents a linear or branched C5 alkyl group, as well as the use of such compounds in a fragrant and/or flavouring composition.
Claims25
A process of preparing a compound of formula (I)
- wherein R represents a linear or branched C5 alkyl group, the process comprising reacting a compound of formula (III)
- wherein R is as defined in respect of formula (I), with a compound of formula (IV)
- in the presence of an acid, the reaction being carried out in an organic solvent selected from the group comprising toluene, xylene, trimethylbenzene, cyclohexane, and methylcyclohexane, at a temperature of about 70° C. to reflux, preferably at 80° C. to 90° C., and even more preferably at about 80° C.
Compound of formula
- wherein R is selected from the group consisting of 3-pentyl, 1-(2-methyl-butyl), 2-(2-methyl-butyl), 2-(3-methyl-butyl), and 1-(2,2-dimethyl)-propyl.
Compound of formula
- wherein R represents a linear or branched C5 alkyl group.
Compounds of formula
- wherein R is selected from the group consisting of 1-pentyl, 3-pentyl, 1-(2-methyl-butyl), 2-(2-methyl-butyl), 2-(3-methyl-butyl), 1-(3-methyl-butyl), and 1-(2,2-dimethyl)-propyl and R′ is a carbonyl group substituted with a hydrogen atom or a linear or branched C1-C6 alkyl group or a linear or branched C2-C6 alkenyl group, provided that R is not 1-pentyl in formula I.
Dependencies are inferred from the claim text.