Acetic Anhydride → N-(3-Bromopyridin-2-yl)acetamide

Temperature

100 °C

3-Bromo-pyridin-2-ylamine (1.00 g, 5.78 mmol) was dissolved in acetic anhydride (12.4 mL). This solution was heated at 100° C. for 16 h and cooled to room temperature. The mixture was concentrated in vacuo, diluted with EtOAc (100 mL) and poured into a mixture of ice and saturated NaHCO3 solution (150 mL). This mixture was then saturated with solid NaHCO3 and extracted with EtOAc (3×150 mL). The combined EtOAc extracts were dried (MgSO4), filtered and concentrated in vacuo to give 1.49 g of N-(3-Bromo-pyridin-2-yl)-acetamide in a quantitative yield. HPLC Rt=1.79 min (YMC S5 ODS column 4.6×50 mm, 10-90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm) LC/MS: M+H+=215.

1. temperaturecooled to room temperature
2. concentrationThe mixture was concentrated in vacuo
3. additiondiluted with EtOAc (100 mL)
4. additionpoured into a mixture of ice and saturated NaHCO3 solution (150 mL)
5. extractionsaturated with solid NaHCO3 and extracted with EtOAc (3×150 mL)
6. dry with materialThe combined EtOAc extracts were dried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo

ORD record

ord-fdc3ca9954a94343980105c8b29d97a9

Source dataset

uspto-grants-2008_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07378426B2