HCID 10192985, compound → HCID 10308259, compound

Participants

Reaction Steps

Methyl triphenylphosphonium bromide (0.122 g, 0.334 mmole) was dissolved in 5 mL THF and placed in an acetone/dry ice bath at −78° C.; n-Butyl lithium (0.131 mL, 0.328 mmole) was added and the mixture was allowed to stir for 30 minutes. To this solution was added aldehyde 3 (0.078 g, 0.278 mmole) in 3 mL THF. After stirring at room temperature for 4 hours, the reaction mixture was placed in an oil bath and allowed to stir overnight. at 65° C. The solvent was evaporated and the residue was poured into water and extracted with ethyl acetate. The combined organic phases were washed with saturated sodium bicarbonate, water, brine, and dried with magnesium sulfate. The organic phases were concentrated and the residue was loaded on to silica gel and chromatographed with silica gel (hexanes:ethyl acetate, 95:5) to afford 0.055 g (71%) of 28 as a white solid: Mp=182–184° C.; 1H NMR (DMSO-d6) δ 7.87 (d, 2 H, J=8.4 Hz), 7.22 (s, 1 H), 7.08 (m, 3 H), 6.98 (m, 1 H), 6.96 (d, 1 H, J=2.3 Hz), 6.30 (d, 1 H, J=17.8 Hz), 5.59 (d, 1 H, J=11.4 Hz), 3.82 (s, 3 H), 3.80 (s, 3 H); MS 281 (M+H)+

Provenance & Evidence