Acetic Anhydride → HCID 23648726, compound

Participants

Reaction Steps

To a solution of Example 40D (265 mg, 0.76 mmol) in tetrahydrofuran (5 mL) at room temperature, was added diisopropylethyl amine (400 uL) followed by acetic anhydride (150 μL, 1.59 mmol). After an hour the reaction was quenched with methanol and stirred for additional hour. The solvent was removed under vacuum and the product was purified via silica-gel column chromatography using a gradient of 25 to 75% ethyl acetate in hexane to provide the title compound (152 mg). 1H NMR (300 MHz, CDCl3) δ ppm 7.90 (s, 1H) 7.17-7.25 (m, 2H) 6.89-6.99 (m, 2H) 6.09 (d, J=7.72 Hz, 1H) 5.33-5.53 (m, 1H) 4.54 (heptet, J=6.0 Hz, 1H) 2.08 (s, 3H) 1.62 (d, J=7.0 Hz, 3H) 1.36 (d, J=6.0 Hz, 6.0H).). MS (DCI): m/z 389 (M+H).

Provenance & Evidence