Hydrochloric Acid → 2-Methoxy-4-methylbenzenemethanamine

Temperatur

60 °C

To a solution of 2-methoxy-4-methylbenzamide (14.55 g, 88.08 mmol) in dry THF (50 mL) was added dropwise Borane-tetrahydrofuran complex (1.0 M in THF, 220 mL, 2.5 eq) at 0° C. under N2 atmosphere. The reaction mixture was then heated to 60° C. overnight. The reaction was cooled to room temperature, aq. HCl (6 N, 37 mL) was added carefully and the reaction mixture was then heated at 70° C. for 2 hrs. After cooling, water was added and the resulting solution was washed with ether. The aqueous layer was basified with aq. NaOH (10 N) at 0° C. and saturated with K2CO3 then extracted with ethyl acetate. The organic layer was washed with brine, dried over MgSO4, filtered and evaporated to give 8.5 g of (2-methoxy-4-methylphenyl)methanamine. (64% yield)

1. temperatureThe reaction was cooled to room temperature
2. temperaturethe reaction mixture was then heated at 70° C. for 2 hrs
3. temperatureAfter cooling
4. washthe resulting solution was washed with ether
5. customwas basified with aq. NaOH (10 N) at 0° C. and saturated with K2CO3
6. extractionthen extracted with ethyl acetate
7. washThe organic layer was washed with brine
8. dry with materialdried over MgSO4
9. filtrationfiltered
10. customevaporated

ORD-Eintrag

ord-34eb81c691bd47b19c943fd3c8e8e348

Quelldatensatz

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08148536B2