Process for the production of spirodienones and spirocyclic keto

Details Process for the production of spirodienones and spirocyclic keto Process for the production of spirodienones and spirocyclic keto

1978-06-09

1980-05-20

Morgenstern, Norman

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

252522R, 260456R, 260456P, 260586P, 568377, 568774, C07C 4500

Patent

active

042039258

ABSTRACT:
This invention concerns processes for preparing compounds having the structure ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is the same or different and represents hydrogen or a lower alkyl group and wherein each dashed line represents a carbon-carbon single bond or a carbon-carbon double bond. Those compounds in which all three dashed lines represent carbon-carbon double bonds are prepared by reacting phenols and 2-alkylidene-1,4-disubstituted butanes. Selective reduction of these compounds yields those in which at least one dashed line represents a carbon-carbon single bond. Most of the compounds so prepared are new compounds. All are useful as fragrance materials either directly and/or in compositions and/or have useful fixative properties in fragrance compositions.

REFERENCES:
Bozzato et al., "CA", 84:90326x (1976).
Stork et al., "CA", 78:31559z (1973).
Caine et al., "CA", 81:37663s (1974).
Marshall et al., "CA", 69:27539a (1968).
Marshall et al., "CA", 72:43903a (1970).
McCurry et al., "79" 18873c (1973).
Coxon et al., "82" 73206z (1975).
Hikino et al., "Tetra", vol. 27, pp. 4831-4836 (1971).

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