Benzoyl Peroxide → HCID 59383483, compound

Participants

Reaction Steps

A solution of 2-chloro-5-ethylpyrimidine (1.15 g, 8.1 mmol) in 20 mL of carbon tetrachloride was treated with N-bromosuccinimide (1.50 g, 8.4 mmol) and a catalytic amount (about 1 mol percent based on reactants) of benzoyl peroxide and then heated to 75° C. After several hours and additional catalyst, the starting material was completely consumed. The solids were removed and the filtrate was concentrated. The resulting residue was further purified by flash column chromatography on silica gel using a mixture of ethyl acetate (EtOAc) and petroleum ether as the eluant. The solvents were removed under reduced pressure to yield 0.64 g (36%) of 5-(1-bromoethyl)-2-chloropyrimidine (A) as a clear liquid: 1H NMR (CDCl3) δ 8.70 (s, 2H), 5.15 (q, J=8.0 Hz, 1H), 2.10 (d, J=8.0 Hz, 3H); GCMS (FID) m/z 222 (M+). Some of the corresponding dibromo compound 0.44 g (18%) was also isolated, as a white solid: mp 84-85° C.; 1H NMR (CDCl3) d 9.00 (s, 2H), 3.00 (s, 3H); LC-MS (ESIMS) m/z 298 (M+H).

Provenance & Evidence