Abstract: The present invention primarily relates to a process for producing alkylpyrazines, the process comprising thermal treatment of an amino acid source in a high boiling solvent, the amino acid source containing at least threonine and/or serine and the thermal treatment yielding alkylpyrazines; and separation of the alkylpyrazines from the high boiling solvent.

Abstract: The present invention primarily relates to a method for producing an aromatic blend comprising unsaturated dienals. The invention further relates to aromatic blends obtained or obtainable by a method according to the invention and compositions or semi-finished products for producing said compositions, comprising aromatic blends according to the invention. A further aspect of the present invention relates to the use of an aromatic blend according to the invention for aromatizing a composition, preferably a composition serving for food or pleasure, or a semi-finished product for producing such a composition.

Abstract: The present invention relates to a flavour mixture containing 2E,4Z,7Z- and 2E,4E,7Z-tridecatrienal. This flavour mixture can be produced advantageously from arachidonic acid or oils containing esters thereof.

Abstract: The invention relates to a method of producing an onion flavour compositions, said method comprising: providing onion juice concentrate having a dry matter content of 40-95 wt. %; providing onion component selected from fresh onion, dehydrated onion and combinations thereof; mixing the onion juice concentrate with the onion component in a weight ratio, calculated on a dry matter basis, of 100 parts by weight of dry matter from onion juice concentrate with 4 to 80 parts by weight of dry matter from onion component, to produce an onion mix having a dry matter content of 20-80 wt. %; subjecting the onion mix to a heat treatment at a temperature of at least 90° C. for at least 15 minutes; optionally mixing the heat treated onion mix with additional onion component and/or additional onion juice concentrate to produce an onion blend; drying the heat treated onion mix or the onion blend to produce a dried onion composite having a water content of less than 10 wt. %.

Abstract: The invention relates to a method of producing an onion flavour composition, said method comprising: providing onion component selected from fresh onion, dehydrated onion and combinations thereof; providing onion juice concentrate having a dry matter content of 40-95 wt. %; mixing the onion component with the onion juice concentrate in a weight ratio, calculated on a dry matter basis, of 100 parts by weight of dry matter from onion component with 60 to 1000 parts by weight of dry matter from onion juice concentrate, to produce an onion mix; subjecting the onion mix to a heat treatment at a temperature of more than 100° C. for at least 5 minutes; and drying the onion mix to a water content of less than 10 wt. % simultaneous with and/or after the heat treatment. This method yields a shelf-stable onion flavour composition that has an intense flavour, and that can suitably be used to impart the flavour of sautéed onion to a wide variety of edible products.

Abstract: The present invention primarily relates to a method for producing an aromatic blend comprising unsaturated dienals. The invention further relates to aromatic blends obtained or obtainable by a method according to the invention and compositions or semi-finished products for producing said compositions, comprising aromatic blends according to the invention. A further aspect of the present invention relates to the use of an aromatic blend according to the invention for aromatizing a composition, preferably a composition serving for food or pleasure, or a semi-finished product for producing such a composition.

Abstract: The present invention relates to a flavour mixture containing 2E,4Z,7Z- and 2E,4E,7Z-tridecatrienal. This flavour mixture can be produced advantageously from arachidonic acid or oils containing esters thereof.

Abstract: 3,6-Dimethyl-2(3H)-benzofuranone is a new, valuable flavor material. A process for its industrial-scale preparation was developed.

Abstract: A flavor composition comprising 8-ocimenyl esters of the formula wherein one of the two radicals R1 and R2 is methyl and the other is vinyl and one of the two radicals R3 and R4 is methyl and the other is wherein R5 is hydrogen, alkyl or alkenyl. Such flavor composition can also be mint and/or fruit flavor compositions, wherein the 8-ocimenyl esters have a flavor-enhancing action.

Abstract: Compounds of the formula ##STR1## in which one of the radicals R.sup.1 and R.sup.2 is methyl and the other is vinyl and one of the radicals R.sup.3 and R.sup.4 is methyl and the other is ##STR2## in which R.sup.5 is hydrogen, alkyl or alkenyl, in particular C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl, are particularly suitable as fragrances and flavors.