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ChemicalBook CAS DataBase List (3,4-DIMETHOXY-BENZOYLAMINO)-ACETIC ACID
59893-89-9

(3,4-DIMETHOXY-BENZOYLAMINO)-ACETIC ACID synthesis

3synthesis methods
-

Yield:59893-89-9 85%

Reaction Conditions:

with trifluoroacetic acid in dichloromethane at 0 - 20;

Steps:

10

To a solution of the above amide intermediate (3.92 g, 13.14 mmol) in dichloromethane (100 mL) at 0° C is added trifluoroacetic acid (50 mL) and the reaction stirred at room temperature for 72 h with periodic venting. The reaction is concentrated at 40 0C and the resulting oil dissolved in dichloromethane and concentrated again. The oil is slurried in EtOAc (150 mL). The resulting precipitate is filtered, washing with EtOAc to give 2.72 g of the carboxylic acid intermediate in 85% yield

References:

WO2010/126811,2010,A1 Location in patent:Page/Page column 151-152