To a solution of Example 179B (0.15 g, 0.5 mmol) in benzene (5 mL) was added celite (0.15 g), pyridinium dichromate (0.75 g, 2.0 mmol), and a solution of 70% t-butyl peroxide in water (0.25 mL, 2.0 mmol). The heterogenous solution was filtered through celite. The filtrate was diluted with ethyl acetate (10 mL), washed with 5% Na2S2O5 (10 mL), dried (Na2SO4), and concentrated in vacuo. Column chromatography on silica (5% to 15% ethyl acetate/hexane gradient) affored the product as colorless oil (0.12 g, 75%). 1H NMR (300 MHz, CDCl3) δ ppm 0.53 (m, 1 H), 0.76 (m, 7 H), 1.35 (m, 1 H), 1.73 (s, 3 H), 1.80 (m, 1 H), 2.09 (m, 1 H), 3.84 (s, 3 H), 4.51 (m, 2 H), 5.97 (s, 1 H), 7.43 (m, 2 H), 7.59 (m, 1 H), 8.20 (d, J=7.72 Hz, 1 H); MS m/z 317.1 (M+H)+.
