Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1994-10-18
1995-08-08
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549332, 549525, C07D31178
Patent
active
054400503
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.
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de Loureiro da Silva Tavares da Rosa Maria R.
de Oliveira Baptista Marcelo Curto Maria J. V.
do Ceu Goncalves da Costa Maria
Motherwell William B.
Cebulak Mary C.
Givaudan-Roure Corporation
Gould George M.
Johnston George W.
Raymond Richard L.
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