1,3-Propanediol → 3-[5-Methyl-3-(2-trifluoromethylphenylsulfonyloxy)phenoxy]propanol

Participants

Reaction Steps

To a solution of 5-methyl-3-(2-trifluoromethylphenylsulfonyloxy)phenol (665 mg, 2.0 mmol), as prepared in the preceding step, tri-n-butylphosphine (607 mg, 3.0 mmol), and 1,3-propanediol (760 mg, 10 mmol) in anhydrous tetrahydrofuran (20 mL) was added 1,1'-(azodicarbonyl)dipiperidine (757 mg, 3.0 mmol). The mixture was stirred at room temperature overnight. Hexane (30 mL) was added to the mixture, and the precipitates were removed by filtration. The filtrate was evaporated in vacuo, and the residue was purified by flash column chromatography (2:1 hexane/ethyl acetate) to give the title compound as a colorless oil (745 mg, 94%). 1H-NMR (300 MHz, CDCl3) δ 8.13 (d, J=7.2 Hz, 1 H), 7.99 (d, J=7.2 Hz, 1 H), 7.80 (t, J=7.6 Hz, 1 H), 7.70 (t, J=7.3 Hz, 1 H), 6.63 (s, 1 H), 6.48 (s, 1 H), 6.46 (s, 1 H), 4.02 (t, J=6.0 Hz, 2 H), 3.81 (m, 2 H), 2.25 (s, 3 H), 1.99 (m, 2 H), 1.61 (s, 1 H).

Provenance & Evidence