1-Bromopentadecane → HCID 67356403, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution at −78° C. containing 1.00 g (3.25 mmol) of 5-(Benzyloxy)-2-(2,5-dimethyl-1H-pyrrol-1-yl)-4,6-dimethylpyrimidine and 630 μL (2.16 mmol) of 1-bromopentadecane in 20 mL of anhydrous THF were added 2.70 mL (4.32 mmol) of a 1.60 M solution of n-BuLi in pentane. The reaction mixture was stirred at 23° C. for 30 min. The reaction was quenched with saturated aqueous ammonium chloride and then poured into 70 mL of water. The mixture was then extracted with two 70-mL portions of diethyl ether. The combined organic layer was then washed with a 100-mL portion of brine, dried (MgSO4) and then concentrated under diminished pressure. The residue was purified by chromatography on a silica gel column (15×5 cm). Elution with 4:1 hexanes-diethyl ether afforded the expected product as a colorless oil: yield 269 mg (24%); silica gel TLC Rf 0.5 (4:1 hexanes-diethyl ether); 1H NMR (CDCl3) δ0.89 (t, 3H, J=7.2 Hz), 1.20-1.30 (m, 26H), 1.75 (quint, 2H, J=7.2 Hz), 2.29 (s, 6H), 2.47 (s, 3H), 2.76 (dd, 2H, J=8.0, 8.0 Hz), 4.89 (s, 2H), 5.85 (s, 2H) and 7.30-7.42 (m, 5H); 13C NMR (CDCl3) δ 14.08, 14.30, 14.30, 19.27, 22.66 27.72, 29.33, 29.40, 29.50, 29.55, 29.63, 29.63, 29.63, 29.67, 29.67, 29.67, 29.67, 31.61, 31.89, 75.72, 107.91, 128.01, 128.22, 128.72, 129.30, 129.30, 136.22, 147.35, 147.35, 152.59, 161.59 and 165.09; mass spectrum (APCI), m/z 518.4113 (M+H)+ (C34H52N3O requires 518.4110).

Provenance & Evidence