Patent ID: 7842841

Claim:
A process for the preparation of timberone, the process comprising the step of reacting citral with a 2-pentanone in the presence of an aldolization catalyst to produce 8,12-dimethyl-5,7,11-tridecatrien-4-one and cyclization of 8,12-dimethyl-5,7,11-tridecatrien-4-one in the presence of an acid to 1-(2,6,6-trimethylcyclohex-2-en-1-yl)-1-hexen-3-one and/or 1-(2,6,6-trimethylcyclo-hex-1-en-1-yl)-1-hexen-3-one and hydrogenation of 1-(2,6,6-trimethylcyclohex-2-en-1-yl)-1-hexen-3-one and/or 1-(2,6,6-trimethylcyclohex-1-en-1-yl)-1-hexen-3-one in the presence of a Pt and for Pd catalyst.