Process for the preparation of alkyl 3-alkoxypropionates
AssigneeEastman Kodak Company
InventorsPeter W. Raynolds, Glenn C. Jones
Life of this patent
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Abstract
Disclosed is an improved process for the preparation of alkyl 3-alkoxypropionates containing at least seven carbon atoms by the reaction of dialkoxymethane containing five or more carbon atoms with a ketene in the presence of a catalytic amount of the reaction product of an alkylcarboxylic acid anhydride and concentrated or fuming sulfuric acid.
Claims6
In a process for the preparation of an alkyl 3-alkoxypropionate containing at least seven carbon atoms which comprises reacting a dialkoxymethane containing at least five carbon atoms with a ketene at a temperature of about 10.degree. to 50.degree. C. in the presence of an acid catalyst, the improvement comprising carrying out the process in the presence of the reaction product of a carboxylic acid anhydride and concentrated or fuming sulfuric acid as the acid catalyst.
Process for the preparation of an alkyl 3-alkoxypropionate containing at least seven carbon atoms which comprises reacting a dialkoxymethane containing at least five carbon atoms with a ketene at a temperature of about 10.degree. to 60.degree. C. in the presence of about 0.01 to 2.0 weight percent, based on the weight of the dialkoxymethane, of an acidic composition obtained by reacting a carboxylic acid anhydride and concentrated or fuming sulfuric acid.
Process for the preparation of an alkyl 3-alkoxypropionate containing at least seven carbon atoms which comprises reacting a dialkoxymethane having the formula
- R.sup.1 OCH.sub.2 OR.sup.2
- with ketene at a temperature of about 10.degree. to 30.degree. C. in the presence of about 0.05 to 0.5 weight percent, based on the weight of the dialkoxymethane, of an acidic composition obtained by reacting acetic anhydride and oleum, wherein R.sup.1 and R.sup.2 are the same alkyl groups of two to about four carbon atoms.
Dependencies are inferred from the claim text.