Trifluoromethanesulfonic acid → Methyl (3R)-3-(benzyloxy)tetradecanoate

Participants

Reaction Conditions

Reaction Steps

To a solution of compound 30 (2.8 g, 10.83 mmol) and benzyl trichloroacetimidate (3.4 g, 14 mmol) in DCM (100 mL) was added trifluoromethanesulfonic acid (0.24 mL, 2.7 mmol) dropwise at 0° C. The resulting mixture was stirred at 0° C. for 6 h and warmed to room temperature. The mixture was washed with a saturated solution of NaHCO3 (300 mL) and water (300 mL) and the organic layer dried over Na2SO4. The drying agent was removed by filtration, and the solvents removed using a rotary evaporator. The residue was purified by chromatography on silica gel (80 g RediSep column, eluting with a gradient of 0% through 30% ethyl acetate/hexanes over 60 min, 60 mL/min) to give the product 31 (1.2 g, 32%) as a colorless liquid. 1H NMR (300 MHz, CDCl3) δ 7.30-7.05 (m, 5H), 4.51 (s, 2H), 3.90-3.80 (m, 1H), 3.70 (s, 3H), 2.58-2.45 (m, 2H), 1.80-1.60 (m, 2H), 1.50-1.20 (m, 18H), 0.85 (t, J=5.8 Hz, 3H).

Provenance & Evidence