hrs. The reaction was diluted with ethyl acetate (5 mL) and water (5 mL). The organics were separated and the aqueous further extracted with ethyl acetate (2 x 5 mL). The combined organics were washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude material was purified by flash column chromatography (0 -20% ethyl acetate in cyclohexane) to yield the title compound as a pale-yellow oil (160 mg, 92%). ¹H NMR (400 MHz, CDCl3): δ 7.64 (s, 1 H), 7.61 .