Process for preparing cis-hexahydrodibenzopyranones

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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C07D31178

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041316142

ABSTRACT:
Reaction of a 5-substituted resorcinol with a 1-alkoxy-4-(1-hydroxy-1-methylethyl)-1,4-cyclohexadiene in the presence of a catalyst such as boron tribromide, boron trifluoride or stannic chloride, and in the presence of about an equimolar quantity of water, affords predominantly a cis-hexahydrodibenzopyranone in high yields.

REFERENCES:
archer et al, J. Org. Chem., 42, 2277 (1977).
Razdan et al, JACS, 96, 5860 (1974).
Razdan et al, Tetrahedron Letters, pp. 4947-4950 (1969).

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