Process for producing dihydrocarvone geometric isomers

Details Process for producing dihydrocarvone geometric isomers Process for producing dihydrocarvone geometric isomers

1980-01-07

1981-10-20

Trousof, Natalie

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

Organic compounds

Oxygen containing

568376, C07C 4551, C07C 4558

Patent

active

042962579

ABSTRACT:
Cis- and trans-limonene oxides can be separated effectively one from the other by either fractional distillation or by substantially selectively rearranging with acid catalysis at mild temperature said cis-isomer into trans-dihydrocarvone. The distillatively-separated limonene oxide isomers or the remaining unreacted trans-limonene oxide isomer then is available for discrete conversion into a corresponding dihydrocarvone isomer with minimal equilibration by further acid-catalyzed rearranging at mild temperature.

REFERENCES:
patent: 3538164 (1970-11-01), Leffingwell
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Rickborn et al., JACS, 93, pp. 1693-1700, (1971).
Russells et al., Science, 172, pp. 1043-1044, (1971).
Kirk, Chem. & Industry, (3), pp. 109-113, (1973).
Chemical Abstracts, vol. 81: 136305h, (1974).

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