Internal hydroformylation of acrolein acetals
AssigneeThe Dow Chemical Company
InventorPhilip E. Garrou
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Abstract
Acrolein acetals are selectively hydroformylated on the unsaturated carbon atom adjacent to the carbon bearing two ether groups in the presence of a supported rhodium-cobalt bimetallic cluster. The resulting internally hydroformylated product is useful as a precursor of methacrylic acid.
Claims6
A one-step process for selectively hydroformylating an acetal of acrolein to a corresponding methylol acetal comprising contacting an acetal of acrolein with a gaseous mixture of carbon monoxide and hydrogen in the presence of a catalytic amount of a rhodium-cobalt bimetallic cluster loaded on an amine resin at a pressure of at least 500 p.s.i.a. and at a temperature in the range from about 50.degree. to about 175.degree. C., so as to effect hydroformylation predominantly on the acetal's unsaturated carbon atom adjacent to the carbon atom bearing two ether groups.
Dependencies are inferred from the claim text.