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US 5,179,229 AGranted
Preparation of 2,2-diorgano-3-arylpropionic acids and esters thereof
AssigneeHoechst Celanese Corporation
InventorVaradaraj Elango
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Abstract
A process for the preparation of 2,2-diorgano-3-arylpropionic acids is disclosed by the carbonylation of corresponding 2,2-diorgano-1-aryl ethanol in the presence of a Lewis acid catalyst. Furthermore, a process for the production of 2,2-diorgano-3-arylpropionic esters is disclosed by reacting a corresponding 2,2-diorgano-1-aryl ethanol with carbon monoxide and an alcohol in the presence of a Lewis acid catalyst.
Claims20
A method of preparing a compound of the formula:
- ##STR6## comprising the step of reacting a compound of the formula:
- ##STR7## with carbon monoxide, in the presence of a Lewis acid catalyst, wherein R.sub.1 and R.sub.2 are independently an alkyl group containing one to 18 carbon atoms, an unsubstituted aryl group or a substituted aryl group wherein at least one ring carbon is bonded to an alkyl group, an alkoxy group, a halogen or a hydroxy group, and wherein Ar is an unsubstituted aryl radical or a substituted aryl radical substituted independently at one or more substitutable positions.
A method of producing a compound of the formula:
- ##STR8## comprising the step of reacting a compound of the formula:
- ##STR9## with carbon monoxide and an alcohol of the formula R.sub.3 --OH, in the presence of a Lewis acid catalyst, wherein R.sub.3 is an organic group and R.sub.1 and R.sub.2 are independently an alkyl group containing one to 18 carbon atoms, an unsubstituted aryl group or a substituted aryl group wherein at least one ring carbon is bonded to an alkyl group, an alkoxy group, a halogen or a hydroxy group and wherein Ar is an unsubstituted aryl radical or a substituted aryl radical substituted independently at one or more substitutable positions.
Dependencies are inferred from the claim text.