The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 1988
Filed:
Dec. 30, 1985
Werner Hoffmann, New York, NY (US);
Lothar Janitschke, Kleinniedesheim, DE;
Basf Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Novel disubstituted bicyclo[2.2.1]heptanes of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.3 -alkyl, R.sup.2 is C.sub.1 -C.sub.8 -alkyl or-alkenyl, R.sup.3 and R.sup.4 together are .dbd.O, .dbd.CH--CN, .dbd.CH--CO--OCH.sub.3 or .dbd.CH--CO--OC.sub.2 H.sup.5, or R.sup.3 is hydrogen, --CH.sub.3, --CH.dbd.CH.sub.2 or --C.tbd.CH when R.sup.4 is --OH or --O--CO--CH.sub.3, or R.sup.3 is H when R.sup.4 is --CH.sub.2 --CO--OCH.sub.3, --CH.sub.2 --CO--OC.sub.2 H.sub.5 or --CH.sub.2 --C.tbd.N and one or both of the dashed lines may be a further bond, are obtained by subjecting cyclopentadiene to a Diels-Alder reaction with an unsaturated ketone, this reaction being catalyzed by a Lewis acid, and then subjecting the compound of the formula Ia ##STR2## initially formed to a reduction, a Grignard reaction or a reaction with diethylphosphonoacetonitrile or ethyl phosphonoacetate and NaH. They can be used as scents and/or aromas or as intermediates for scents.