Stannous Chloride → 2-Amino-5-(trifluoromethyl)phenol

2-Amino-5-trifluoromethylphenol was prepared by treating 2-nitro-5-trifluoromethylphenol (500 mg, 2.41 mmol) with a solution of SnCl2 (3.5 g, mmol) in EtOH at 23° C. for 12 h. The mixture was concentrated to 50 mL and adjusted to pH7 using saturated sodium bicarbonate. The reaction mixture was partitioned between H2O and EtOAc. The aqueous layer was separated and extracted with EtOAc. The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The resulting colorless oil(370 mg, 87%) was used without further purification. 1H NMR (CDCl3): 7.6 (s, 1H), 7.39(d, 1H, J=8.5 Hz), 7.08(d, 1H, J=8.5 Hz)

1. concentrationThe mixture was concentrated to 50 mL
2. customThe reaction mixture was partitioned between H2O and EtOAc
3. customThe aqueous layer was separated
4. extractionextracted with EtOAc
5. dry with materialThe combined organic extracts were dried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe resulting colorless oil(370 mg, 87%) was used without further purification

ORD record

ord-3405daf94e7b498ab07bbf97ff8bc2de

Source dataset

uspto-grants-1999_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05886044