Abstract: Schiff bases having the formula ##STR1## wherein R.sup.1 signifies CH.sub.3, C.sub.2 H.sub.5R.sup.2 signifies H, CH.sub.3R.sup.3 signifies H, C.sub.1-4 -alkylR.sup.4, R.sup.5, R.sup.6,R.sup.7 signify H, CH.sub.3, C.sub.2 H.sub.5, CH.sub.2 CH.sub.2 CH.sub.3, CH(CH.sub.3).sub.2,X signifies methylene, ethylidene, propylidene, ethylene, propylene, 2,3-butylidene,total number of carbon atoms of R.sup.4, R.sup.5, R.sup.6, R.sup.7, .ltoreq.6 are novel odorants.

Abstract: Described are oxypentamethylindane carboxaldehydes defined according to the generic structure: ##STR1## wherein R' represents a hydrogen or methyl, methods for preparing same, organoleptic uses thereof and cosmetic and pharmaceutical compositions containing them. The oxypentamethylindane carboxaldehydes particularly are useful in perfumery and as U.V. absorbers in sun screen compositions.

Abstract: Compound of formula ##STR1## wherein a) indexes m and n are identical and stand each for an integer number equal to zero, symbols R.sup.1 and R.sup.2 are identical and represent each a hydrogen atom, or are different and represent each a hydrogen atom or a methyl radical, symbols R.sup.5 and R.sup.8 stand each for a methyl radical, symbols R.sup.6 and R.sup.7 can be identical or different and designate each a hydrogen atom or a methyl radical and, either symbol R.sup.4 represents a methyl radical and symbol R.sup.3 stands for a hydrogen atom or a methyl radical, or symbols R.sup.3 and R.sup.4 represent each a methylene radical belonging to a ring such as indicated by the dotted line, with the proviso that the following combinations are excluded:1. R.sup.1 =R.sup.2 =R.sup.3 =R.sup.6 =R.sup.7 =H, or2. R.sup.1 =R.sup.2 =R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or3. R.sup.2 =CH.sub.3 and R.sup.3 =R.sup.6 =R.sup.7 =H, or4. R.sup.2 =CH.sub.3 and R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or5. R.sup.1 =R.sup.

Abstract: The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6, 7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8- octahydronapthalene.

Abstract: Compound of formula ##STR1## wherein a) indexes m and n are identical and stand each for an integer number equal to zero, symbols R.sup.1 and R.sup.2 are identical and represent each a hydrogen atom, or are different and represent each a hydrogen atom or a methyl radical, symbols R.sup.5 and R.sup.8 stand each for a methyl radical, symbols R.sup.6 and R.sup.7 can be identical or different and designate each a hydrogen atom or a methyl radical and, either symbol R.sup.4 represents a methyl radical and symbol R.sup.3 stands for a hydrogen atom or a methyl radical, or symbols R.sup.3 and R.sup.4 represent each a methylene radical belonging to a ring such as indicated by the dotted line, with the proviso that the following combinations are excluded:1. R.sup.1 =R.sup.2 =R.sup.3 =R.sup.6 =R.sup.7 =H, or2. R.sup.1 =R.sup.2 =R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or3. R.sup.2 =CH.sub.3 and R.sup.3 =R.sup.6 =R.sup.7 =H, or4. R.sup.2 =CH.sub.3 and R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or5. R.sup.1 =R.sup.

Abstract: The present invention relates to a novel indane compound which is 5-formyl-1,1,2,3,3,4,6-heptamethylindane, a compound of the formula ##STR1##

Abstract: Novel acylated tetramethyl and pentamethyl isopropyl indane compounds having a fragrant musk-like aroma are disclosed.

Abstract: Described are acylated bicycloalkadiene-compound-containing compositions of matter, mixtures of compounds containing predominantly compounds having the structures: ##STR1## with the compositions of matter containing from 50 up to 100% of the compound having the structure: prepared by reacting the compound having the structure: ##STR2## or a mixture containing, predominently, the compound having the structure: with acetic anhydride in the presence of a Lewis acid catalyst such as boron trifluoride etherate.Also described are perfumery uses of such compositions of matter for augmenting or enhancing the aroma of perfume compositions, colognes or perfumed articles such as solid or liquid anionic, cationic, nonionic or zwitterionic detergents, cosmetic powders, hair preparations and the like.

Abstract: Novel odorants of the formula ##STR1## namely, 1,1,2,4,4-pentamethyl-6-formyl-1,2,3,4-tetrahydronaphthalene (1a) and 1,1,2,4,4-pentamethyl-7-formyl-1,2,3,4-tetrahydronaphthalene (1b), possess powerful, very natural-warm, musk-like odor notes.