Reaction Steps
(185) A solution of 2-(oxazol-5-yl)pyridine (102 mg, 0.70 mmol) in anhydrous THF (5 mL) cooled to −75° C. under N2 was treated with n-BuLi (2.5 M in hexanes, 1.1 equiv, 0.77 mmol, 0.31 mL), and stirred for 20 min. ZnCl2 (0.5 M in THF, 2.0 equiv, 1.40 mmol, 2.8 mL) was added at −75° C., and stirred for 45 min at 0° C. Cul (1.0 equiv, 0.70 mmol, 133 mg) was added, and the solution was stirred for 10 min at 0° C. Lauroyl chloride (2 equiv, 1.4 mmol, 306 mg, 0.32 mL) was added and the solution was stirred for 1 h at 0° C. The reaction was diluted with EtOAc (10 mL), and washed with 15% aqueous NH4OH (1×10 mL), H2O (1×10 mL), and saturated aqueous NaCl (1×10 mL). The organic layer was dried (Na2SO4), filtered, and concentrated under reduced pressure. Flash chromatography (SiO2, 2.5 cm×17.5 cm, 20% EtOAc-hexanes) afforded 1-(5-(pyridin-2-yl)oxazol-2-yl)dodecan-1-one (185) (122 mg, 0.37 mmol, 53% yield) as an off-white powder: mp 73-74° C.; 1H NMR (CDCl3, 250 MHz) d 8.65 (br d, J=4.0 Hz, 1H), 7.89-7.75 (m, 3H), 7.34-7.25 (m, 1H), 3.09 (t, J =7.7 Hz, 2H), 1.83-1.69 (m, 2H), 1.41-1.19 (m, 16H), 0.86 (br t, J=7.0 Hz, 3H); 13C NMR (CDCl3, 62.5 MHz) d 188.6, 153.2, 150.1 (2C), 146.3, 137.1, 126.8, 124.1, 120.3, 39.1, 31.9, 29.6 (2C), 29.4, 29.3, 29.2 (2C), 24.0, 22.7, 14.1; IR (KBr) umax 2929, 2857, 1704, 1609, 1415, 1378 cm−1; MALDI-FTMS (DHB) m/z 329.2214 (C20H28N2O2+H+ requires 329.2223).
