Process for preparing esters
AssigneeLee Pharmaceuticals
InventorsDonald G. Stoffey, Jan Alexander Orlowski
Life of this patent
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Abstract
Esters are prepared by reaction of acyl halides and alcohols or hydroxyalkyl esters and acid halides in the presence of a tertiary amine and polar aprotonic solvents. Bis(2-methacrylatoethyl) phthalate is prepared by the reaction of phthaloyl chloride with 2-hydroxyethyl methacrylate in pyridine and acetone. Bis-phenol-A-bis(2-methacrylatoethyl)ether is prepared from 2,2-bis[4-(2-hydroxyethoxy)phenyl]-propane and methacryl chloride in acetone.
Claims2
In a process for making esters of the formula ##STR11## by the reaction of a compound of the formula
- R(OH).sub.x
- with a compound of the formula ##STR12## wherein R and R.sub.1 are each independently alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, or substituted aryl, and X is halogen, and x is a positive integer, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in a polar aprotonic solvent as the reaction medium, wherein the solvent is comprised of acetone.
In a process for making bis acrylates by the reaction of an acryl halide with a diol, or by the reaction of a hydroxyalkyl acrylate with a dicarboxylic acid halide, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in acetone as the reaction medium.
Dependencies are inferred from the claim text.