摘要:
The present invention relates to a process for preparing a (1S,2R)-(2-hydroxy-3,5,5-trimethyl-3-cyclopentenyl)methyl carboxylate compound of the following general formula (S,R)-(2), wherein R 1 represents a monovalent hydrocarbon group having 1 to 6 carbon atoms, and a bold wedged bond represents the absolute configuration, and a (1R,2S)-(2-acetoxy-3,5,5-trimethyl-3-cyclopentenyl)methyl carboxylate compound of the following general formula (R,S)-(3), wherein R 1 is as defined above, a hashed wedged bond represents the absolute configuration, and Ac represents an acetyl group, the process comprising: subjecting a (1RS,2SR)-(2-hydroxy-3,5,5-trimethyl-3-cyclopentenyl)methyl carboxylate compound of the following general formula (RS,SR)-(2), wherein R 1 is as defined above, and a hashed unwedged bond represents a relative configuration, to a kinetic resolution reaction with a lipase in the presence of vinyl acetate to obtain the (1S,2R)-(2-hydroxy-3,5,5-trimethyl-3-cyclopentenyl)methyl carboxylate compound ((S,R)-(2)) and the (1R,2S)-(2-acetoxy-3,5,5-trimethyl-3-cyclopentenyl)methyl carboxylate compound ((R,S)-(3)).
摘要:
La présente demande concerne des compositions cosmétiques ou pharmaceutiques comprenant des composés de formule (I) :
dans laquelle : - R 1 est un radical choisi parmi -COOR', -CONR'R", -CH 2 OR', -COR', -CH 2 R',-SO 2 OR', -PO 3 R'R", -NHR' avec R' et R" désignant un atome d'hydrogène ou un radical hydrocarboné en C1-18, - R 2 est un radical hydrocarboné en C1-18. L'invention concerne également l'utilisation de ces composés pour favoriser la desquamation de la peau, stimuler le renouvellement épidermique et lutter contre les signes du vieillissement cutané.
摘要:
The present invention refers to the use as flavour or fragrance of a compound of formula (I) wherein R4 is hydrogen and the bond between C-3 and C-4 is a single bond or the dotted line together with the bond between C-3 and C-4 represents a double bond; or R4 is methylene, forming with C-3 and C-4 a cyclopropane ring; R3 is hydrogen, C1, C2, C3, C4, C5, C6 alkyl, or C2, C3, C4, C5, C6 alkenyl; and I) R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; or II) R1 is hydroxyl and R2 is selected from C1, C2, C3 alkyl, and C2, C3, C4 alkenyl.
摘要:
The invention relates to a method for determining the enantiomer ratio of trimethylcyclopentene derivatives of structure (I), wherein Z is an alkyl radical having 1 - 10 C atoms, can be saturated or olefinically unsaturated, straight-chained or branched and which is substituted by an OH or CHO group, by means of capillary gas chromatography, wherein a stationary phase is applied containing a compound selected from the group of Heptakis-(2,3-di-O-methyl-6-O-tert.-butyldimethylsily)-β-Cyclodextrin and Heptakis-(2,3-di-O-acetyl-6-O-tert.-butyldimethylsilyl)-β-Cyclodextrin and at least one polysiloxane, wherein the mixing ratio of Cyclodextrin derivatives and polysiloxanes is adjusted to a value ranging from 10: 90 to 50: 50.
摘要:
The invention relates to compounds of the general formula wherein R 1 to R 3 and R 6 are H, methyl or ethyl, R 4 is methyl or ethyl, or R 1 +R 2 form -C(H 2 ) n -, with n being 3 or 4 and the use of these compounds as an odorant or as an ingredient of an odorant composition.