Hydrogen Bromide → 3,5-Dibromo-4-hydroxypyridin-2(1H)-one

To 4-hydroxypyridin-2(1H)-one (5.55 g, 50 mmol) was added 48% aqueous hydrobromic acid (50 mL, 921 mmol) to produce a pale tan solution. Bromine (5.67 mL, 110 mmol) was added to produce an amber solution. After 3 days a yellow precipitate had formed. To the reaction was added 300 mL of water causing a thick white sly to form which was stirred for 1 hour. The reaction was filtered and washed with 4×50 mL of water. to yield product (13.506 g, 1.81 mmol, quantitative yield) as a white powder. MS (ESI) 190 (M+1).

1. customto produce a pale tan solution
2. customto produce an amber solution
3. customAfter 3 days a yellow precipitate had formed
4. customto form which
5. filtrationThe reaction was filtered
6. washwashed with 4×50 mL of water

ORD record

ord-352c20ee678f4580a9d2b7c06fb9bb13

Source dataset

uspto-grants-2011_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08003796B2