Isolongifolanol derivatives, their production and their use

US5693606A · kind A · utility

Assignee

• DRAGOCO Gerberding & Co. AG · DE

Inventors

• Ernst-Joachim Brunke · Holzminden, DE
• Dietmar Schatkowski · Stadtoldendorf, DE

Key dates

• Filing date: Feb 22, 1995
• Grant date: Dec 2, 1997
• Expiry date: Feb 22, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2603/95
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The described compounds of the general formula A, in which the wavy lines mean .alpha. and .beta. configuration and R.sub.1 and R.sub.2 mean hydrogen, methyl or ethyl groups ##STR1## are new and useful as odorants or components or mixtures of odorants or perfume oils. Their production in a method known per se, involves oxidation of isolongifolene obtained from longifolene to isolongifolane, which is then equilibrated with base extraction and/or reduced to isolongifolan-3-ol and this is then reacted with a symmetric acetal of the formula R.sub.2 --OCHR.sub.1 --O--R.sub.2, in which R.sub.1 is hydrogen or methyl and R.sub.2 is methyl, ethyl or propyl.