Method for reducing 3-dimethylamnio-2-phenylpropion-acid...

Details Method for reducing 3-dimethylamnio-2-phenylpropion-acid... Method for reducing 3-dimethylamnio-2-phenylpropion-acid...

2007-09-25

2007-09-25

Oh, Taylor Victor (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

09889383

ABSTRACT:
A process for reducing the content of ethyl 3-dimethylamino-2-phenylpropionate in a solution, contaminated therewith, of ethyl 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylate in a water-immiscible solvent, which comprises adding from 0.5 to 2.0 equivalents of a carboxylic acid per mole of ethyl 2-dimethylamino-1-phenyl-3-cyclohexene-1-carboxylate to this solution, and stirring this mixture at a temperature of from 50° C. to 100° C., is described.

REFERENCES:
patent: 1 768 704 (1971-11-01), None
patent: 2 261 462 (1974-05-01), None
patent: 1 226 318 (1971-03-01), None

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