HCID 11135098, compound → HCID 22375877, compound

Participants

Reaction Steps

The product of Example 19B (7.3 g, 27 mmoles) and tetrabutylammonium dibenzylphosphate (13.8 g, 26.6 mmol) were mixed in 20 ml of tetrahydrofuran and stirred at room temperature for 24 hours. The mixture was diluted with 100 mL of tetrahydrofuran, filtered through celite and the solvent was evaporated. The residue was resuspended in 200 mL of 20% ethyl acetate in hexane and the precipitate was filtered and washed with an additional 100 mL of 20% ethyl acetate. The organic filtrates were combined and the solvent was evaporated. Final product was obtained by flash chromatography on silica using 20% ethyl acetate in hexane. Fractions containing product were combined and the solvent was removed to give 8.7 g (78%) of a colorless oil. 1H NMR (300 MHz, CDCl3) δ ppm 0.91 (t, J=7.29 Hz, 3 H) 1.31-1.45 (m, 2 H) 1.55-1.65 (m, 2 H) 2.80-2.90 (m, 2 H) 5.07 (d, J=7.80 Hz, 4 H) 5.65 (d, J=13.90 Hz, 2 H) 7.34 (s, 10 H).

Provenance & Evidence