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Title: Carotenoid intermediate by an oxidation process

Abstract: A process for synthesizing 3,5,5-trimethyl-4-[(E)-3-oxo-1-butenyl]-2-cyclohexen-1-one which is a known intermediate in a process for preparing a carotenoid.


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Inventors: Lohri, Bruno (Kaiseraugst, CH)

Application Number: 06/244574
Filing Date: 1981-03-17
Publication_date: 1983-07-12
Assignee: Hoffmann, Roche LA.

Primary Class(es): 568/344 568/360
Other Classes: C07C45/34; C07C45/00; C07C45/34
US Patent Ref:
3944620March, 1976Becker et al.568/344Process for the preparation of oxophorones
4026948May, 1977Becker et al.568/344Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione
4046813September, 1977Brenner568/344Process for producing ketoisophorone
4092361May, 1978Costantine et al.568/344Process for the preparation of 3,5,5-trimethyl-cyclohex-2-ene-1,4-dione

Other Refs: Other References: Hays et al., Cam. J. Chem., vol. 43, pp. 1306-1317 (1965).

Primary Examiner: Reamer, James H.
Assistant Examiner:
Attorney: Saxe, Jon S.
Gould, George M.
Shearer, Peter R.
Claims: