The organics were separated and the aqueous was extracted with dichloromethane (2 x 10 mL). The combined organics were passed through a phase separator and concentrated under reduced pressure. The crude material was purified by flash column chromatography (0 -30% ethyl acetate in cyclohexane) to yield the title compound as an off-white solid (0.14 g, 98%). ¹H NMR (400 MHz, CDCl3): δ 7.63 (d, J = 6. .