Bromoform → [3-Bromo-5-(trifluoromethyl)phenyl]methanol

Temperatur

80 °C

[3-amino-5-(trifluoromethyl)phenyl]methanol (900 mg, 4.71 mmol) (Step A, Example 24) was suspended in CHBr3 (9 mL), and t-butyl nitrite (600 μL, 5.04 mmol) was added dropwise by syringe. The reaction was heated slowly to 80° C. and was maintained at this temperature for 10 minutes. The reaction was then cooled to room temperature, diluted with hexanes (50 mL), loaded on a silica gel column, and purified with 100% hexanes to 20% EtOAc/hexanes (2 columns) to afford [3-bromo-5-(trifluoromethyl)phenyl]methanol. Rf=0.31 (25% EtOAc/hexanes). 1H NMR (CDCl3, 500 MHz) δ 7.71 (s, 1H), 7.68 (s, 1H), 7.56 (s, 1H), 4.76 (d, J=5.5 Hz, 2H), 1.86 (t, J=5.7 Hz, 1H).

1. temperaturewas maintained at this temperature for 10 minutes
2. temperatureThe reaction was then cooled to room temperature
3. custompurified with 100% hexanes to 20% EtOAc/hexanes (2 columns)

ORD-Eintrag

ord-74cf6f234cbe43b29a1dfbd15642b98c

Quelldatensatz

uspto-grants-2012_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08193365B2