Firmenich Sa

Roger L Snowden

Bernard L Muller

Karl H Schulte-Elte

Christian Vial

Anthony Alexander Birkbeck

Gary B Womack

Hervé Mosimann

Arnoldus Uijttewaal

The present invention relates to compounds of formula (I) that are useful as perfuming ingredients of the fruity type. Formula (I) is in the form of any one of its stereoisomers or of a mixture thereof, wherein Rrepresents a Calkyl or alkenyl group, Rrepresents a methyl or ethyl group, Rrepresents a Calkyl or alkenyl group, and the compound (I) has from 8 to 12 carbon atoms.

Fruity odorant

The present invention concerns the use as perfuming ingredient (of the fruity type) of a compound of formula in the form of any one of its stereoisomers or of a mixture thereof, and wherein Rrepresents a Calkyl or alkenyl group, Rrepresents a methyl or ethyl group, Rrepresents a Calkyl or alkenyl group, and the compound (I) has from 8 to 12 carbon atoms.

The present invention concerns the use as perfuming ingredient (of the fruity type) of a compound of formula (I) in the form of any one of its stereoisomers or of a mixture thereof, and wherein Rrepresents a Calkyl or alkenyl group, Rrepresents a methyl or ethyl group, Rrepresents a Calkyl or alkenyl group, and said compound (I) has from 8 to 12 carbon atoms. 

The present invention relates to the field of organic synthesis. More particularly it provides a process for making aromatic non-conjugated enol esters or enol ethers from an aromatic compound or moiety and a protected enal compound or moiety, such as an acetal or an acylal. The reaction is promoted by a salt of formula MX, M representing a transition metal such as Zn or Fe and X representing a mono-anion, or by BY, wherein Y represents a fluoride or a phenyl group optionally substituted.

Catalytic scriabine reaction

The present invention relates to a process for making indenol esters or ethers from an &#x3b1;-substituted cinnamic aldehyde derivative such as an acetal or an acylal. Said reaction is promoted by the use of strong mineral acids, sulphonic acids, acidic zeolites or Lewis acids.

Process for producing indenol esters or ethers

Nitrogen containing compounds of formula ##STR1## wherein symbol R designates a C.sub.1 -C.sub.3 alkyl group, each of R.sup.1 and R.sup.2 represents, when taken separately, a C.sub.1 -C.sub.6 alkyl radical or, when taken together, a polymethylene and R.sup.3 represents a C.sub.1 -C.sub.3 alkyl group, preferably a methyl radical, or a hydrogen atom. Process for their preparation comprising the addition of an amine of formula ##STR2## to an aldehyde of formula ##STR3## Use of said compounds (I) as starting materials for the preparation of decalin ketone derivatives of general formula ##STR4## containing a double bond in one of the positions indicated by the dotted lines and wherein R.sup.4 designates a hydrogen atom or a methyl radical, and symbols R and R.sup.3 have the meaning indicated for formula (I).

Nitrogen containing compounds, their preparation and use of same for the

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 wherein

Process for the preparation of polyunsaturated cycloaliphatic ketones

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.

Process for the preparation of delta- and epsilon-damascones

.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.

Process for the preparation of .alpha.,.beta.-and

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.

Process for the preparation of hydroxy-ketones

New phosphonium salts useful as starting materials for preparing unsaturated bicyclic compounds. Process for their preparation.

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Grand-Lancy, Switzerland

Roger L Snowden