January 17, 2011

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 61 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.


Patent Number: US 7842841
Title: Novel process for the preparation of timberone
Inventor(s): Bonrath, Werner; Schuetz, Jan
Patent Assignee(s): DSM IP Assets B. V., Neth.
Source: PCT Int. Appl. 13pp. CODEN: PIXXD2
Language: English
This invention relates to a novel process for the prepn. of timberone useful for perfume or cosmetics.  Aldol condensation of citral with 2-pentanone gave (E/Z)-Me(CH2)2COCH:CHCH:CMe(CH2)3CH:CMe2 which was cyclized using H3PO4 to give cyclohexene I.  I was then hydrogenated to give the title compd. in 91% yield.

View the full-text patent from USPTO.

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