Use for preparing smoking tobacco compositions of spiropyran derivatives

摘要

Described are spiropyran derivatives useful in preparing smoking tobacco compositions and flavoring compositions for tobacco having the structure: <IMAGE> wherein R1 is hydrogen or methyl; wherein R2, R3, R4, R5, R6 and R7 represents hydrogen or C1-C5 lower alkyl; wherein when one of R2, R3, R4, R5, R6 or R7 is any of C2-C5 lower alkyl, each of the other of the R2, R3, R4, R5, R6 and R7 moieties is hydrogen; wherein each of the dashed lines represents a carbon-carbon single bond or a carbon-carbon double bond, with at least one of the dashed lines being a carbon-carbon single bond. In tobacco flavoring such compounds give rise to aromatic, sweet, minty and cooling notes.