Lever Brothers Company

Arnoldus Van Der Heijden

Tamme S Doornbos

Petrus G Haring

Johannes F De Rooij

Leonard Schutte

Johannes W Van Der Kamp

The present invention is concerned with a flavor concentrate containing a precursor of biacetyl, which concentrate is characterized in that it contains 0.1-99 wt. % precursor compound(s) having the following structural formula: ##STR1## in which X is ##STR2## and in which R.sub.1, R.sub.2, R.sub.5 and R.sub.6 can differ from each other or can be identical and consist of a methyl or ethyl group. It has been found that the present precursor compounds release biacetyl upon heating. By using the present precursor compounds in food products problems attached to the use of very volatile diketones in food products may be overcome.

Use of diketone precursors in food products

A butter-like concentrate is provided, which concentrate is a mildly heated mixture of

Butter-like concentrate

Foodstuffs with improved flavor properties are obtained by incorporation of a diester of monothiocarbonic acid containing radicals characteristic of a flavoring thiol, a secondary or tertiary alcohol and carbonic acid. These diesters were found to be excellent precursors of flavoring thiols, releasing the thiols at a controlled rate under mild conditions. Particularly suitable diesters have the general formula R.sup.1 --S--CO--O--R.sup.2, in which

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's-Gravenzande, Netherlands

Arnoldus Van Der Heijden