Process for preparation of 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran
AssigneeFMC Corporation
InventorsBorivoj R. Franko-Filipasic, Philip B. Hobson
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Abstract
A process for preparing 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran in which 2-methallyloxyphenol is heated to a temperature in the range of 150.degree. C. to 250.degree. C. in the presence of a solvent and a Lewis acid catalyst under an autogenous pressure of 20 to 60 psig is disclosed and exemplified.
Claims7
A process for thermally rearranging and cyclizing 2-methallyloxyphenol in the presence of a solvent to form 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran which comprises heating 2-methallyloxyphenol in a pressurizable reactor at a temperature in the range of 150.degree. C.-250.degree. C. in the presence of a catalytic amount of Lewis acid catalyst selected from the group consisting of aluminum chloride, zinc chloride, mercuric chloride, hydrogen chloride, ferrous chloride, rhodium chloride, stannic chloride, magnesium chloride and ferric chloride, under an autogenous pressure in the range of 20 to 60 psig.
Dependencies are inferred from the claim text.