Haarmann & Reimer Gmbh

Wilhelm Gottsch

Rudolf Hopp

Thomas Thielmann

Detlef Hagena

Egon Oelkers

Jurgen Nienhaus

Jurgen Neinhaus

Fritz Exner

Ethers of 1-hydroxy-hex-5-en-2-one are useful odoriferous substances which have a very complex fragrance pattern and allow an interesting variation in the scent of perfume oils.

Ethers of 1-hydroxy-hex-5-en-2-one, processes for their preparation and

New nitriles which are odoriferous substances having an extremely fresh note are accessible by Knoevenagel condensation of 2-cyclopentyl-cyclopentanone and cyanoacetic acid and decarboxylation of the reaction product.

Cyclopentyl-cyanomethyl-cyclopentenes, process for their preparation and

The invention relates to new alkadienenitriles of the formula ##STR1## in which n is an integer from 5 to 9, a process for their preparation and their outstanding suitability as odororiferous substances.

Alkadienenitriles, process for their preparation and their use

The invention relates to new methylcyclododecatri-2,5,9-en-1-oles of formula ##STR1## in which one of the dashed lines represents a double bond and the other a single bond, and the endocyclic double bonds may be cis- and trans-configured, a process for their preparation and their use as scents.

Methylcyclododecatri-2,5,9-en-1-ols, a process for their preparation,

The invention relates to 1,2-dialkoxyalkenes of the formula ##STR1## in which R denotes an alkyl group having 1 to 3 carbon atoms, and

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Bevern, Germany

Wilhelm Gottsch