Hydrochloric Acid → 4-Bromo-2-methylpyridin-3-amine

Temperature

40 °C

4-Bromo-2-methyl-3-nitropyridine (1.2 g, 5.53 mmol) was dissolved in HCl (2.189 ml, 26.3 mmol), tin(II)chloride dihydrate (4.99 g, 22.12 mmol) was added and stirred at 40° C. for 1 hour. The reaction mixture was made basic with 30% NaOH (18 mL), extracted with EtOAc, dried over sodium sulfate and concentrated under vacuum to give a yellow oil. The oil was further dried under high vacuum for 4 hours to give 4-bromo-2-methylpyridin-3-amine (1 g, 5.35 mmol, 97% yield) which was stored at −17° C. until use and was used without further purification. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.26-2.42 (3H, m) 5.05-5.34 (2H, m) 7.17-7.32 (1H, m) 7.46-7.64 (1H, m). MS [M+H] found 187.0.

1. extractionextracted with EtOAc
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated under vacuum
4. customto give a yellow oil
5. customThe oil was further dried under high vacuum for 4 hours

ORD record

ord-cb67c1c0f492402eb4ce8bd3e2c72259

Source dataset

uspto-grants-2015_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09073918B2