Iodine → HCID 68719179, compound

Participants

Reaction Steps

To a cold (−78° C.) solution of Example 48A (500 mg, 3.26 mmol) in tetrahydrofuran (50 mL) was added n-butyllithium (4.08 mL, 6.53 mmol, 1.6M in hexane) dropwise. After stirring for 30 min, a solution of iodine (0.829 g, 3.26 mmol) in tetrahydrofuran (5 mL) was added dropwise. After 2 h, the reaction was quenched by the addition of 10% Na2S2O3 solution (10 mL) and ethyl acetate (10 mL) and warmed to room temperature. The layers were separated, and the aqueous was extracted with additional ethyl acetate (2×50 mL). The combined organics were washed with brine (1×50 mL), dried over Na2SO4, concentrated under reduced pressure, and purified by chromatography on SiO2 gel, eluting with 50% ethyl acetate in hexane, to give the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.65 (s, 2H), 1.79 (s, 2H), 1.89 (s, 2H), 2.02 (s, 2H), 5.50 (s, 1H), 7.22 (s, 1H).

Provenance & Evidence