Processes for preparing 4-tert.-butylcyclohexanol and 4-tert.-butylcyclohexyl acetate
AssigneeSumitomo Chemical Company, Limited
InventorsMasahito Sekiguchi, Shin Tanaka
Life of this patent
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Abstract
4-tert.-Butylcyclohexanol having a larger content of its cis-isomer is prepared by hydrogenating 4-tert.-butylphenol in a solvent in the presence of a rhodium catalyst and a compound selected from the group consisting of hydrogen chloride and (anhydrous) sulfuric acid. Furthermore, 4-tert.-butylcyclohexanol obtained by the above hydrogenation is acetylated to give 4-tert.-butylcyclohexyl acetate.
Claims9
A process for preparing 4-tert.-butylcyclohexanol comprising hydrogenating 4-tert.-butylphenol in a solvent in the presence of (1) at least one rhodium catalyst selected from the group consisting of metal rhodium and rhodium compounds supported on a carrier, and (2) a compound selected from the group consisting of hydrogen chloride and (anhydrous) sulfuric acid, wherein hydrogen chloride or (anhydrous) sulfuric acid is present in an amount of 1.4 to 10 moles per one mole of elemental rhodium.
A process for preparing 4-tert.-butylcyclohexyl acetate comprising the steps of:
- hydrogenating 4-tert.-butylphenol in a solvent in the presence of (1) at least one rhodium catalyst selected from the group consisting of metal rhodium and rhodium compounds supported on a carrier and (2) a compound selected from the group consisting of hydrogen chloride and (anhydrous) sulfuric acid, wherein hydrogen chloride or (anhydrous) sulfuric acid is present in an amount of 1.4 to 10 moles per one mole of elemental rhodium, to obtain 4-tert.-butylcyclohexanol, and
- then acetylating 4-tert.-butylcyclohexanol to obtain 4-tert.-butylcyclohexyl acetate.
Dependencies are inferred from the claim text.