Verwendung hydrierter Indenopyrane als Riechstoffe sowie diese enthaltende Riechstoffkompositionen
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:EP0013423A2
公开(公告)日:1980-07-23
Verwendung von gegebenenfalls durch einen Methylrest substituierten ,3,4,4αβ,5,9bβ-hexahydroindeno-[1,2-b]∂ pyran als Riechstoffe, sowie diese enthaltende Riechstoffkompositionen.
Hydrogenated indenopyrans and their use in aromatic compositions
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:US04271047A1
公开(公告)日:1981-06-02
This invention is directed to compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen or a methyl radical, with the proviso that only one of R.sub.1 and R.sub.2 is methyl radical, as well as to aromatic compositions containing said compounds and the use of such aromatic compositions to impart desired odors.
A nitrite-catalyzed ring contraction reaction of substituted tetrahydrofurans by oxidation of bromide under aerobic conditions as a dehydrogenative dual functionalization was developed to provide 2-acyltetrahydrofurans in good yields. On the other hand, the oxidation reaction of 1-substituted isochromans occurred via the bromohydroxylation to give 1-(dibromoalkyl)-1-hydroxyisochromans in high yields