Sulfuric Acid → 8-Bromo-4-methylquinoline

Participants

Reaction Conditions

Reaction Steps

2-Bromoaniline (5.16 g, 30 mmol) dissolved in acetic acid and conc. sulfuric acid was treated with a solution of methyl vinyl ketone in acetic acid. The reaction mixture heated to 90° C. for 14 h. The cooled mixture was poured into water and basified with sodium hydroxide and extracted into EtOAc. The organics were dried over Na2SO4, and concentrated the purified by SGC (Combiflash 0-100% EtOAc: hexanes over 30 minutes) followed by recrystallization from hot hexanes furnished 4-methyl-8-bromoquinoline (2.3 g). 1H NMR (CDCl3) δ 8.92 (d, 1H), 8.08 (d,1H), 8.01 (d,1H), 7.45 (t,1H), 7.32 (d,1H), 2.71 (s, 3H).

Provenance & Evidence