Preparation of cis-hexahydrodibenzopyranones

Details Preparation of cis-hexahydrodibenzopyranones Preparation of cis-hexahydrodibenzopyranones

C - Chemistry, Metallurgy

07

D

260/359.9

C07D 311/80 (2006.01) C07C 45/51 (2006.01) C07D 311/78 (2006.01)

Patent

CA 1132589

Abstract Reaction of 4-(1-hydroxy-1-methylethyl)- 3-cyclohexen-1-one with a 5-substituted resorcinol in the presence of a catalyst provides, depending upon the duration of reaction, either a 2,7-dihydroxy- 5-isopropylidene-9-substituted-2,6-methano-3,4,- 5,6-tetrahydro-2H-1-benzoxocin or a 6a,10a-cis- 1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10- 10a-hexahydro-9H-dibenzo[b,d]pyran-9-one.

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