2-Methyl-2-butene → HCID 89650319, compound

Participants

Reaction Steps

A solution of sodium chlorite (1.19 g; 13.13 mmol; 5.5 eq.) and sodium dihydrogenphosphate (1.03 g; 8.59 mmol; 3.6 eq.) in water (7 mL) was added dropwise to a mixture of 2-methyl-2-butene (2.39 mL) and 3-(5-fluoro-2-formyl-phenoxy)-azetidine-1-carboxylic acid tert-butyl ester (705 mg; 2.39 mmol; 1 eq.) in 1,4-dioxane (7 mL). The reaction mixture was stirred at room temperature for 16 hours and the 1,4-dioxane concentrated in vacuo. The aqueous solution was diluted with water and the pH made acidic with 0.1M HCl. The precipitate was filtered off and dried to afford the title compound (625 mg, 84%) as a white solid. 1H NMR (CDCl3) δ 8.17 (dd, J=8.8, 6.7 Hz, 1H), 6.85 (ddd, J=8.9, 7.6, 2.3 Hz, 1H), 6.35 (dd, J=9.9, 2.3 Hz, 1H), 5.25-4.87 (m, 1H), 4.41 (ddd, J=10.1, 6.4, 1.2 Hz, 2H), 4.11 (ddd, J=10.0, 4.0, 1.1 Hz, 2H), 1.45 (s, 9H). HPLC (max plot) 96.4%; Rt 3.60 min.

Provenance & Evidence