Hydrochloric Acid → 1-(S)-[alpha-(R)-methoxybenzyl]-3-methylbutylamine

Temperature

5 °C

The N-[1-(S)-[α-(R)-methoxybenzyl]-3-methyl-butyl]phthalimide (25.6 g, 75.9 mmol.) obtained above was suspended in ethanol (250 mL). To the suspension was added hydrazine hydrate (7.5 mL), and the resulting mixture was heated under reflux for 15 hours. The reaction mixture was chilled in an ice bath, and stirred at 5° C. for one hour after addition of 4N hydrochloric acid (200 mL). The insoluble material was removed by filtration and washed with 4N hydrochloric acid. The filtrate and washings were combined, and placed under reduced pressure to distill off ethanol. The residue was made basic to reach pH approx. 11, by addition of 10N aqueous sodium hydroxide solution, and extracted with chloroform. The extract was washed with aqueous saturated sodium chloride solution and dried over anhydrous sodium sulfate. The dried extract was placed under reduced pressure to give the titled compound as pale yellow oil (15.5 g, purity: 91%, yield. 81%).

1. temperaturethe resulting mixture was heated
2. temperatureunder reflux for 15 hours
3. temperatureThe reaction mixture was chilled in an ice bath
4. customThe insoluble material was removed by filtration
5. washwashed with 4N hydrochloric acid
6. distillationto distill off ethanol
7. additionby addition of 10N aqueous sodium hydroxide solution
8. extractionextracted with chloroform
9. washThe extract was washed with aqueous saturated sodium chloride solution
10. dry with materialdried over anhydrous sodium sulfate
11. extractionThe dried extract

ORD record

ord-af2b38c1e0a144f78ed6268a9514083a

Source dataset

uspto-grants-2004_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06689785B2