Givaudan S.a.

Givandan S.a.

Urs Mueller

Fridtjof Schröder

Jürg Daniel Oetiker

Samuel Derrer

Georg Frater

Philip Kraft

Jerzy A Bajgrowicz

Peter Gygax

Sébastien March

John Norman Short

Compounds of the formula 1 wherein, R is hydrogen, alkyl or substituted alkyl, aryl or substituted aryl, are useful intermediates in the synthesis of fragrance ingredients such as Ambrox 2 

2-(alkoxy or aryloxy carbonyl)-4-methyl-6-(2,6,6-trimethylcyclohex-1-enyl)hex-2-enoic acid compounds, its preparation and use

2-(alkoxy or aryloxy carbonyl)-4-methyl-6-(2,6.6-trimethylcyclohex-1- enyl)hex-2-enoic acid compounds, its preparation and use

Compounds of the formula 1 wherein, R is hydrogen, alkyl or substituted alkyl, aryl or substituted aryl are useful intermediates in the synthesis of fragrance ingredients such as Ambrox 2. 

2-(Alkoxy or aryloxy carbonyl)-4-methyl-6-(2,6,6-trimethylcyclohex-1-enyl)hex-2-enoic acid compunds, its preparation and use

A process for the preparation of &#x3b2;,&#x3b3;-unsaturated-&#x3b3;, &#x3b3;-disubstituted esters 1 with high E/Z- and &#x3b2;,&#x3b3;/&#x3b1;,&#x3b2;-ratios, Formula (1) by reacting at a temperature of between about 130 and 170 degrees centigrade the conjugated malonate Formula (3) with, a group I, II or III metal halide or an organic cation/halide anion pair, an inorganic proton source and a polar solvent. 

Organic compounds

The present invention refers to the use as flavor or fragrance of a compound of formula (I) 

6-Methoxy-2,6-dimethyloctanal, a method of its production and fragrance compositions comprising it.

2-methoxy-2,6-dimethyloctanal and its use as a fragrance ingredient

A method for the production of campholytic aldehyde starting from campholenic aldehyde in the presence of a copper catalyst and a solvent.

Process for producing 2,2,3-trimethylcyclopent-3-enecarbaldehyde (campholytic aldehyde)

The present invention refers to the use as gas odorant of alkoxy alkynes of formula (I) wherein Ris methoxy or ethoxy; and Ris hydrogen or methyl, to a process of odorizing gas and to fuel gas comprising it.

Gas odorant

A method of preparing enatiomerically enriched 3a,6,6,9a-tetramethyl-dodecahydro-naphtho[2,1-b]furan, formula (I), from (E,E)-homofarnesic acid or (E)-monocyclohomofarnesic acid by (a) reacting firstly with a chiral alcohol, (b) reacting the product of (a) with an acid to cause a first cyclization, (c) producing an alcohol by reacting the product of (b) with a reducing agent and (d) causing a second cyclization by reacting the product of (c) with an acid. The product of this process gives a mixture of both enantiomers with one in excess. 

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Urs Mueller