Boron trifluoride etherate → HCID 76603827, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of ester compound 31 (99 mg, 0.299 mmol) in CH2Cl2 (3 mL) at 0° C. was added triethylsilane (41.9 mg, 0.36 mmol) followed by BF3.Et2O (51 mg, 0.36 mmol) dropwise via microsyringe, and the mixture was stirred at 0° C. for 30 min. The reaction was quenched with saturated NaHCO3 solution (3 mL), diluted with CH2Cl2 (20 mL), and washed with water, and the organic phase was dried and concentrated. Purification by flash silica gel chromatography (10% ethyl acetate in hexane) afforded the title compound 36 (87 mg, 97% yield) as a yellow oil: 1H NMR (300 MHz, CDCl3) δ 7.29 (dd, J=15.6, 0.6 Hz, 1H), 6.98 (d, J=8.7 Hz, 2H), 6.64 (d, J=8.7 Hz, 2H), 5.74 (d, J=15.6 Hz, 1H), 5.73 (br d, J=10.2 Hz, 1H), 4.20 (q, J=6.9 Hz, 2H), 2.90 (s, 6H), 2.73 (m, 1H), 2.53 (d, J=7.2 Hz, 2H), 1.61 (d, J=0.6 Hz, 3H), 1.29 (t, J=6.9 Hz, 3H), 1.00 (d, J=6.6 Hz, 3H); 13C NMR (75 MHz, CDCl3) δ 12.1, 14.3, 20.0, 35.5, 40.8, 42.2, 60.1, 112.7, 115.5, 128.1, 129.7, 131.6, 147.5, 149.0, 149.8, 167.5.

Provenance & Evidence