Hydrochloric Acid → Benzeneethanamine, 3-methoxy-, hydrochloride (1:1)

Temperature

0 °C

Borane dimethyl sulphide (45 ml) was added dropwise to a stirred solution of 3-methoxyphenylacetonitrile (32.4 g) in dry tetrahydrofuran (150 ml) under nitrogen. The solution was heated under reflux for 2 hours and was then cooled to 0° C. The solution was stirred under nitrogen at 0° C. as water (74 ml) was added, followed by concentrated hydrochloric acid (149 ml) dropwise over 1 hour. The cloudy solution was heated on a steam bath for 4 hours and then allowed to cool to room temperature. The suspension was diluted with 5N hydrochloric acid (30 ml) and the acidic mixture was washed with ether then basified with 5N sodium hydroxide and extracted with ether. The extracts were washed with water, dried and evaporated to yield a residue which was dissolved in dry ether (50 ml). A saturated solution of hydrogen chloride in ethanol (30 ml) was added followed by more dry ether (150 ml) and the mixture was cooled to 0° C. to yield 2-(3-methoxyphenyl)ethylamine hydrochloride (m.p. 121°-123° C.). The hydrochloride (27.3 g) was dissolved in 5N sodium hydroxide (100 ml) and extracted with ether. The extracts were washed with water (50 ml) and dried. The solvent was removed by evaporation to give the free base.

1. temperatureThe solution was heated
2. temperatureunder reflux for 2 hours
3. additionwas added
4. temperatureThe cloudy solution was heated on a steam bath for 4 hours
5. temperatureto cool to room temperature
6. washthe acidic mixture was washed with ether
7. extractionextracted with ether
8. washThe extracts were washed with water
9. customdried
10. customevaporated
11. customto yield a residue which
12. temperaturethe mixture was cooled to 0° C.

ORD record

ord-ad7091e54e4d4f1c95e189f5baa43431

Source dataset

uspto-grants-1988_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04767769