Firmenich Sa

Alistair Y Smith

Wilhelm Pickenhagen

Paul Dietrich

Alan F Thomas

3,10-Diacetyl-11-isopropylidene-7,7-dimethyl-tricyclo[6.2.1.0.sup.2,6 ]undeca-2,5,9-triene is a flavoring ingredient useful for the aromatization of smoking articles. It develops upon smoking green, slightly floral, metallic, astringent, fatty, slightly bitter and earthy notes. It is prepared by a two-step process from 1-(4-isopropylidene-1-cyclopent-1-enyl)-1-ethanone.

Tricylic ketone and use of same as flavoring ingredient

The invention relates to the utilization of a mixture of .alpha.-dihydroionone, a compound of formula ##STR1## in combination with .alpha.- and .beta.-ionone as flavouring agent in foodstuffs and beverages in general. Typically, the said compound enables the reconstitution of fruity type flavours, namely of raspberry character.

Flavoring with mixtures of ionones

A cheese flavor is improved or enhanced by the addition to food-products of a diketo-piperazine, defined as cyclo-(Asn--Phe); the typical 'mouth-feel' character is thus developed. A new process for the preparation of the said ingredient is also disclosed.

Process for preparing a diketo-piperazine

A cheese flavor is improved or enhanced by the addition to food-products of a diketo-piperazine, defined as cyclo-(asparagyl-phenylalanyl); the typical 'mouth-feel' character is thus developed. A new process for the preparation of the said ingredient is also disclosed.

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Geneva, Switzerland

Alistair Y Smith