2-Bromo-4-nitro-1-(propan-2-yl)benzene → 3-Bromo-4-isopropylaniline

2-Bromo-1-isopropyl-4-nitrobenzene (XI) (20 g, 79.1 mmol, 96.5 GC % by area), methanol 400 ml), platinum on carbon (1% of platinum, 2% of vanadium, moist with water) (1.0 g, 0.018 mmol) and zinc dibromide (90 mg, 0.40 mmol) were placed in a 600 ml autoclave. The autoclave was subsequently flushed with nitrogen and pressurized to 5 bar with hydrogen at room temperature. The contents of the autoclave were filtered through Celite, washed with methanol and the solvent was distilled off under reduced pressure. 3-Bromo-4-isopropylaniline (17.1 g, 93 LC-% by area, 98.3 GC-% by area, 98% of theory) was obtained as a brown oil.

1. customThe autoclave was subsequently flushed with nitrogen
2. custompressurized to 5 bar with hydrogen at room temperature
3. filtrationThe contents of the autoclave were filtered through Celite
4. washwashed with methanol
5. distillationthe solvent was distilled off under reduced pressure

ORD-Eintrag

ord-02b1d4e161dd4127b3a7e3bbf1ee15c3

Quelldatensatz

uspto-grants-2016_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09440908B2