The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1995
Filed:
Oct. 18, 1994
Applicant:
Inventors:
Maria do Ceu Goncalves da Costa, Lisbon, PT;
Maria J de Oliveira Baptista Marcelo Curto, Oeiras, PT;
Maria R de Loureiro da Silva Tavares da Rosa, Parede, PT;
William B Motherwell, Twickenham, GB;
Assignee:
Givaudan-Roure Corporation, Clifton, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549383 ; 549332 ; 549525 ;
Abstract
A process for the production of ambergris-type labdane spiroketals of general formulae I and II ##STR1## where R represents oxygen or sulphur, useful in the perfumery industry, the said process being characterized by the intramolecular cyclisation of the epoxyketone or its thio analog of general formula III ##STR2## where R.sub.1 represents COCH.sub.3 and R.sub.2 oxygen or sulphur.