Hydrochloric Acid → HCID 53805374, compound

Participants

Reaction Steps

A solution of 4.5 g of 1-amino-3-(2-methyl-phenyloxy)-2-propanol and 4.85 g of 3-(2-oxo-propyloxy)-2-pyridinecarboxylic acid amide in 100 ml of ethanol is heated under reflux for 3 hours. After cooling to room temperature, 1.9 g of sodium borohydride are added whilst stirring; the temperature gradually rises to 45° C. After the reaction has subsided, the mixture is stirred for a further hour. The reaction mixture is then acidified with 2 N hydrochloric acid whilst cooling, and is extracted with 20 ml of ethyl acetate. The aqueous phase is rendered alkaline with a concentrated aqueous sodium hydroxide solution and is extracted with three times 50 ml of ethyl acetate. After drying over sodium sulphate and evaporation of the organic solution, only, crude 1-[1-methyl-2-(2-carbamoyl-3-pyridyloxy)-ethyl-amino]-3-(2-methyl-phenyloxy)-2-propanol is obtained, which forms a neutral fumaric acid salt, melting point 145°-161° C. after recrystallisation from a mixture of methanol and ethyl methyl ketone.

Provenance & Evidence