Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1995-06-07
1997-09-02
Reamer, James H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568668, 560259, C07C 3314
Patent
active
056634595
ABSTRACT:
The present invention relates to novel intermediates for the preparation of vitamin A and carotenoids corresponding to the formula (II): ##STR1## in which A represents a hydrogen or an alkyl, alkenyl or alkoxy group containing 1 to 4 carbon atoms, and X represents a carbon atom, and to a process for their preparation and their use, and further relates to compounds for preparing intermediates of formula (II) corresponding to the formula (III): ##STR2## in which R represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkylcarbonyl, alkenylcarbonyl, alkoxyalkyl or alkoxyalkenyl group in which the alkyl groups have 1 to 10 carbon atoms and the alkenyl groups have 2 to 10 carbon atoms, each of said groups being linear or branched and each being substituted or unsubstituted.
REFERENCES:
patent: 3057913 (1962-10-01), Guax et al.
patent: 3225102 (1965-12-01), Thompson
patent: 3247239 (1966-04-01), Truscheit et al.
patent: 3632860 (1972-01-01), Marbet
patent: 3949006 (1976-04-01), Orashnik
Bienayme Hugues
Meilland Pierre
Reamer James H.
Rhone-Poulenc Nutrition Animale
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