2-alkylidene-3,3,5(3,5,5)-trimethyl cyclopentanones

US4904640A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Thomas Markert · Monheim, DE
• Klaus Bruns · Uerdingen, DE
• Horst-Juergen Krause · Goldkronach, DE
• Josef Penninger · Hilden, DE
• Michael J. Virnig · Tucson, US
• Volker Falk · Velbert, DE

Key dates

• Filing date: Mar 4, 1988
• Grant date: Feb 27, 1990
• Expiry date: Mar 4, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11B9/003
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Alkylidene-3,3,5(3,5,5)-trimethylcyclopentanones corresponding to the following general formula ##STR1## in which three of the substituents R.sub.1 to R.sub.4 are CH.sub.3, one of the substituents R.sub.1 to R.sub.4 is H, and R.sub.5 is a saturated or unsaturated, linear branched C.sub.1 -C.sub.7 alkyl radical, and the double bond is in the endo position to the cyclopentanone structure. The compounds of formula (I) are useful as perfumes.