Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1978-04-21
1979-11-27
Garner, Vivian
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560107, C07C 6916
Patent
active
041762339
ABSTRACT:
An optically active 4-(4-substituted-2,6-dihydroxyphenyl)-6,6-dimethyl-2-norpinanone is reacted with a protonic acid to provide an optical isomer of a cis-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H-dibe nzo[b,d]pyran-9-one. Reaction of said norpinanone with a Lewis acid provides an optical isomer of trans-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H-di benzo[b,d]pyran-9-one. The optically active norpinanones are prepared by reaction of a 5-substituted-resorcinol with an optically active 6,6-dimethyl-2,4-diacetoxy-2-norpinene or an optically active 6,6-dimethyl-2,2-diacetoxy-3-norpinene, which compounds are derived from optically active .beta.-pinenes.
REFERENCES:
patent: 2427345 (1947-09-01), Bain
patent: 2818427 (1957-12-01), Bain et al.
patent: 2834814 (1958-05-01), Bain et al.
patent: 3028418 (1962-04-01), Webb
patent: 3729503 (1973-04-01), Gribou
patent: 3856820 (1974-12-01), Loev
patent: 3856821 (1974-12-01), Loev
patent: 3856822 (1974-12-01), Loev
Mechoulam et al., J. Am. Chem. Soc., 89, 4552, (1967).
Archer Robert A.
Day William A.
Ashbrook Charles W.
Eli Lilly and Company
Garner Vivian
Whale Arthur R.
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