摘要:
The invention pertains to a method for preparing 8-alpha,12-oxido-13,14,15,16, -tetranorlabdane by cyclizing a mixture of hydroxy-olefins (I)-(III. See the specification for their formulae. The cyclization is carried out in the presence of 10 to 100 wt. % acid, relative to the mixture of compounds (I) to (III).
摘要:
In a process for the production of 8.alpha.,12-oxido-13,14,15,16-tetranorlabdane by dehydration of 8.alpha.,12-dihydroxy-13,14,15,16-tetranorlabdane (diol), wherein the diol is subjected to cyclizing dehydration in the presence of 5 to 80% by weight, based on the diol, of at least one alumino layer silicate selected from K catalysts which have an acid charge of less than 100 mval/100 g.
摘要:
2-Alkylidene-3,3,5(3,5,5)-trimethylcyclopentanones corresponding to the following general formula ##STR1## in which three of the substituents R.sub.1 to R.sub.4 are CH.sub.3, one of the substituents R.sub.1 to R.sub.4 is H, and R.sub.5 is a saturated or unsaturated, linear branched C.sub.1 -C.sub.7 alkyl radical, and the double bond is in the endo position to the cyclopentanone structure. The compounds of formula (I) are useful as perfumes.
摘要:
The invention relates to the ether lactone of formula (I) which is characterized by interesting and original odor characteristics, which diffuses extremely well and is suitable for use as a fragrance, for example in cosmetic preparations, technical products or in alcoholic perfumery.
摘要:
The invention relates to the ether lactone of formula (I) which is characterized by interesting and original odor characteristics, which diffuses extremely well and is suitable for use as a fragrance, for example in cosmetic preparations, technical products or in alcoholic perfumery.
摘要:
The invention relates to hexenal derivatives of general structure (I), in which one of the bonds represented by dashes is a C—C single bond and the other is a C═C double bond, with the proviso that the C═C double bond can have a Z or E configuration, provided that it is in the C¾ position. Said derivatives are characterised by an interesting and original perfume that pervades a wide area and are suitable for use as perfumes, for example in cosmetic preparations, technical products or the alcohol-based perfume industry.
摘要:
Compounds of the general formula (I) are described: wherein each of R1, R2, R3, R4, R5 and R6 independently represents a substituent selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, and isopropyl; an wherein x represents either 0 or 1. The compounds are useful as fragrances and as added components in fragrance blends. Methods of improving the harmony, emanation, naturalness an staying power of other fragrance ingredients by the addition of such compounds are also described.
摘要:
Carbonyl compounds derived from the reaction of alkyl cyclopentenols and vinyl ethers are described. The carbonyl compounds described have excellent fragrance properties, and their use as fragrances and/or fragrance-enhancing compounds is also described. Processes for the preparation of the carbonyl compounds are described as well.
摘要:
The use of aldehydes as odorous materials, which can be produced through partial or total hydroformylation of cyclooctadienes, except cyclooctane aldehydes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.
摘要:
The use of bicyclic aldehydes as odorous materials, which can be produced through partial or total hydroformylation of bicyclo[3.3.0]-oct(adi)enes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.