A polyheterocyclic compound, its preparation and a smoking composition in which it is used.

摘要

The invention provides a smoking composition containing a flavourant additive comprising a polyheterocyclic compound corresponding to the formula:
<CHEM>
wherein R is hydrogen or an alkyl group X is a pyrazyl or alkyl-substituted pyrazyl ring containing a total of 4 to 16 carbon atoms, X<1> is a pyrazyl, alkyl-substituted pyrazyl, pyridyl or alkyl-substituted pyridyl ring containing a total of 4 to 22 carbon atoms; each alkyl group or substituent having 1 to 10 carbon atoms, and any adjacent R and X or any adjacent R and X<1> when taken together with connecting elements form an alicyclic structure. The preferred flavourants are novel compounds having the formula
<CHEM>
wherein R<1> and R<2> are hydrogen or methyl or ethyl groups and Y is a pyrazine or pyridine radical corresponding to the structures:
<CHEM>
and any adjacent R<1> and R<2> when taken together with connecting elements form an alicyclic structure. Under smoking conditions such polyheterocyclic compounds flavour mainstream and sidestream smoke. Additionally such compounds will flavour foodstuffs when incorporated therein or when the foodstuff, for example meat, is contacted with gases produced by combustion of a material containing the compounds. The polyheterocyclic compounds will also enhance the aroma of burning combustible articles such as candles or solid fuel.