Abstract: Novel esters of cyclohexene are disclosed having the formula ##STR1## in which R represents hydrogen or a hydrocarbon group containing from 1 to 6 carbon atoms.These novel esters display a wide range of interesting odoriferous properties. A process for the preparation of said esters is also disclosed.

Abstract: A process for the preparation of compounds of the formula I ##STR1## by reacting of a compound of the formula II ##STR2## with up to 1.5 molar equivalent of water at elevated temperature. R represents an alkyl group containing 1 to 3 carbon atoms, R.sup.1 represents an alkyl or alkenyl group containing 3 to 6 carbon atoms and n represents 1 or 2.

Abstract: A novel nitrile 3-(10-undecenyloxy)propionitrile is disclosed having remarkable odoriferous properties and being useful in a variety of compositions and formulations. A process for the preparation of said nitrile is also disclosed.

Abstract: Novel cyclopentanone derivatives are disclosed having the formula ##SPC1##In which R represents a hydrocarbon group of 3 to 7 carbon atoms, X represents a cyano, formyl, hydroxymethyl, lower alkoxymethyl, lower alkanoyloxymethyl or lower alkylcarbonyl group and Y represents an oxo or ketal group,With the proviso that R does not represent an n-pentyl group when, simultaneously, X represents a methylcarbonyl group and Y represents an oxo group.Processes for the preparation of the said cyclopentanone derivatives and also the use thereof in perfumes, cosmetic and other products are disclosed.

Abstract: Methyl dihydrojasmonate containing a major proportion of cis methyl dihydrojasmonate. The NMR spectrum of cis methyl dihydrojasmonate is illustrated in the attached drawings.Cis methyl dihydrojasmonate displays olfactory properties superior to those of the trans isomer making it very useful as an odoriferous agent. In order to prepare methyl dihydrojasmonate containing a major proportion and preferably at least 90% of cis isomer, methyl (2-pentyl-3-keto-cyclopenten-1-yl)-acetate is catalytically hydrogenated in the presence of an aluminium derivative.

Abstract: The novel compound methyl [2-n-propyl-3-keto-cyclo-pent-l-yl]-acetate which is a valuable odoriferous agent is disclosed together with process for its preparation and methods of using it in perfumes, cosmetics and other products. It is noteworthy that the cis isomer possesses olfactory advantages over the trans isomer.

Abstract: Odoriferous compositions containing heterocyclic 4,5-decamethylene compounds of the formulae I and/or II ##SPC1##are disclosed.

Abstract: Novel compounds of the formulae I - IV are disclosed. The compounds are useful as odoriferous agents. Processes for the preparation of said compounds are also disclosed. ##SPC1##In said formulae R.sup.1 and R.sup.2 are hydrogen or an alkyl group having 1 to 5 carbons. R.sup.3 is alkyl having 1 to 5 carbons.

Abstract: Novel odoriferous compositions which contain as an odoriferous material cain cyclopentanone derivatives having the formula ##SPC1##In whichR represents a hydrocarbon group of 3 to 7 carbon atoms,X represents a cyano, formyl, hydroxymethyl, lower alkoxymethyl, lower alkanoyloxymethyl or lower alkylcarbonyl group andY represents an oxo or ketal group,With the proviso that R does not represent an n-pentyl group when, simultaneously, X represents a methylcarbonyl group and Y represents an oxo group.