Process for converting cis-hexahydrodibenzo[b,d]pyran-9-ones to

Details Process for converting cis-hexahydrodibenzo[b,d]pyran-9-ones to Process for converting cis-hexahydrodibenzo[b,d]pyran-9-ones to

1976-07-06

1977-10-18

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D31178

Patent

active

040545822

ABSTRACT:
Reaction of cis-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H-dibe nzo[b,d]pyran-9-ones with an aluminum halide in an unreactive organic solvent effects complete epimerization to provide the corresponding trans-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H-di benzo[b,d]pyran-9-one.

REFERENCES:
razdan et al., Tetrahedron Letters, pp. 4947-4950, (1969).

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