2-Amino-5-bromopyridine → HCID 57494523, compound

Participants

Reaction Steps

2-Amino-5-bromo-pyridine (664 mg, 3.85 mmol), dimethyl diacetoxyfumarate (1.00 g, 3.84 mmol) and glacial acetic acid (10 drops) in dry methanol (10 mL) were combined and heated to reflux. After 48 h the reaction was cooled to room temperature and concentrated in vacuo. Ethyl acetate (2 mL) was added to the residue which was sonicated for 2 min and the resulting precipitate collected by filtration and washed with cold ethyl acetate (1 mL) and dried on the pump to afford 7-bromo-3-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid methyl ester as a yellow solid (24 mg, 2%): 1H NMR (300 MHz, CDCl3) δ 4.19 (3H, s, OCH3), 7.53 (2H, d, J=1.4 Hz, H8 and H9), 9.00 (1H, d, J=1.4 Hz, H6), 10.53 (1H, br s, OH).

Provenance & Evidence