3-Fluorophenol → 1-Benzhydryl-3-(3-fluorophenoxy)azetidine

Participants

Reaction Conditions

Reaction Steps

To a solution of 3.9 g (0.035 mol) of 3-fluorophenol in 250 mL of acetonitrile, was added 6.3 g (0.045 mol) of K2CO3 followed by 12.25 g (0.039 mol) of 1-(diphenylmethyl)-3-methane sulfonyl azetidine, prepared according to the procedure of Example 1a, Step 4. The reaction mixture was heated at 75° C. for 18 h. The solvent was removed under vacuo, and the residue was taken up in a mixture of ether and water. The aqueous layer was extracted with ether, the combined extracts were dried over magnesium sulfate, and the solvent was removed under vacuo. The product was filtered through 500 mL of silica gel, eluted with 50% CH2Cl2/hexane then 15% ethyl acetate/hexane to give 3.4 g of the title compound: mp 81-82° C. 1H NMR (300 MHz, CDCl3) δ 3.17 (dd, 2H), 3.72 (dd, 2H), 4.46 (s, 1H), 4.77 (m, 1H), 6.48 (dd, 1H), 6.53 (dd, 1H), 6.63 (m, 1H), 7.22 (m, 3H), 7.29 (m, 4H), 7.31 (dd, 4H); MS (ES) m/z (relative intensity): 334 (M++H).

Provenance & Evidence