Abstract: Composition consisting of from less than 100% to more than about 80% of trans-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol and a definite amount, but not more than about 20%, of cis-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol.Process for preparing same from .beta.-cyclocitral via a three-, optionally, four-step pathway.Utilization of the said composition as effective perfume ingredient.

Abstract: Composition consisting of from less than 100% to more than about 80% of trans-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol and a definite amount, but not more than about 20%, of cis-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol.Process for preparing same from .beta.-cyclocitral via a three-, optionally, four-step pathway.Utilization of the said composition as effective perfume ingredient.

Abstract: Novel compounds of formula ##STR1## wherein: a. R.sup.1 =CH.sub.3 ; n=m=1; R.sup.2 =CH.sub.3 ; R.sup.3 =R.sup.4 =H,b. R.sup.1 =CH.sub.2 ; n=0; m=1; R.sup.2 =CH.sub.3 ;R.sup.3 =R.sup.4 =H,C. R.sup.1 =CH--CH.sub.3 ; n=0; m=1; R.sup.2 =CH.sub.3 ; R.sup.3 =R.sup.4 =H,d. R.sup.1 =H; n=m=0; R.sup.2 =R.sup.4 =CH.sub.3 ; R.sup.3 =C.sub.2 H.sub.5,e. R.sup.1 =H; n=m=0; R.sup.2 =R.sup.3 =R.sup.4 =CH.sub.3,f. R.sup.1 =H; n=m=0; R.sup.2 =CH.sub.3 ; R.sup.3 =C.sub.2 H.sub.5 ; R.sup.4 =H,g. R.sup.1 =H; n=m=0; R.sup.2 =R.sup.3 =CH.sub.3 ; R.sup.4 =H,h. R.sup.1 =H; n=m=1; R.sup.2 =CH.sub.3 ; R.sup.3 =C.sub.2 H.sub.5 ; R.sup.4 =Hi. R.sup.1 =H; n=m=1; R.sup.2 =R.sup.3 =CH.sub.3 ; R.sup.4 =Hand wherein one of the dotted lines stands for a single carbon-carbon bond and the other one for a double bond, or each of them designates a single bond, possess odorous properties of sandalwood type and consequently can find a utility for the preparation of perfumes and perfumed products.

Abstract: Polyunsaturated ketones of formula ##STR1## having a double bond in position 2' or 3' of the side chain and possessing either an isolated double bond in position 1 or 2, or two conjugated double bonds in positions 1 and 3 of the ring, as indicated by the dotted lines, andwhereinindex n stands for integer 1 or 2, andeach of the symbols R.sup.1 to R.sup.7, identical or different, designates a hydrogen atom or a lower radical,are prepared by a process which makes use of tertiary diallyl carbinols as starting materials.

Abstract: There are disclosed compounds of formula ##STR1## having a single or a double bond in the position indicated by the dotted line and wherein:Z represents an ethylene, ethenyl or an ethynyl divalent radical;X represents a hydrogen atom or an acyl radical, derived from a linear or branched lower hydrocarbon of formula R--CO, wherein R designates a hydrogen atom or a lower alkyl group, andR.sup.1 and R.sup.2, identical or different, represent each a hydrogen atom or a linear or branched alkyl radical.Compounds (I) possess useful perfuming properties.

Abstract: Polyunsaturated ketones of formula ##STR1## having a double bond in position 2' or 3' of the side chain and possessing either an isolated double bond in position 1 or 2, or two conjugated double bonds in positions 1 and 3 of the ring, as indicated by the dotted lines, and whereinindex n stands for integer 1 or 2, andeach of the symbols R.sup.1 to R.sup.7, identical or different, designates a hydrogen atom or a lower alkyl radical,are prepared by a process which makes use of tertiary diallyl carbinols as starting materials.

Abstract: Useful perfumery ingredients delta- and epsilon-damascone are prepared by a process which consists in an anionic cleavage, in the presence of a strong base of a diallyl alcohol of formula ##STR1## wherein the dashed lines in position 3 or 4 of the ring designate a double bond, followed by an isomerization of the terminal double bond of the thus obtained product by means of an acidic isomerizing agent.

Abstract: .alpha.,.beta.-and .beta.,.gamma.-unsaturated ketones of formula ##STR1## possessing a double bond in one of the positions indicated by the dashed lines and wherein R and R.sup.1 have the meaning given above and index n stands for integer 1 or 2, are obtained by a process which consists in treating with a strong base in an inert organic solvent a diallyl carbinol of formula ##STR2## wherein symbol R represents a primary, secondary or tertiary alkyl radical, or a substituted or unsubstituted phenyl radical, and symbol R.sup.1 represents a hydrogen atom or an alkyl radical.

Abstract: Compounds of formula ##STR1## having a double bond in one of the positions indicated by the dotted lines and wherein R represents a hydrogen atom or a methyl radical are utilized as starting materials for the preparation of bicyclic unsaturated hydrocarbons of formula ##STR2## (R=H, CH.sub.3). Conversion of (II) to (I) occurs via thermal treatment in the presence of a metal catalyst.Disclosed is also a process for the preparation of (II).

Abstract: Hydroxy-ketones having formula ##STR1## possessing a double bond in one of the positions indicated by the dotted lines, are prepared starting from a diallyl carbinol of formula ##STR2## Hydroxy-ketones (Ia, b) are useful as intermediates for the preparation of rose oxide.