反应详情

1.0M potassium t-butoxide/THF (5.65 ml, 5.65 mmol) was added to 6-Hydroxy-1-methyl-3,4-dihydro-1H-quinolin-2-one (200 mg, 1.13 mmol) followed by the addition of ethyl iodide (452 μl, 5.65 mmol). The reaction mixture was stirred at room temperature for 2 hours and heated to 45° C. for an overnight. The salts were filtered off, rinsed with ethyl acetate and the combined filtrate was concentrated down to a residue. This was chromatographed using 1:1 ethylacetate/hexane to yield the title compound as a white solid (76 mg, 33% yield). 1H NMR (400 MHz, CDCl3) δ 1.36 (3H, t, J=6.9 Hz), 2.58 (2H, m), 2.82 (2H, m), 3.29 (3H, s), 3.96 (2H, q, J=7.0 Hz), 6.71 (2H, m), 6.84 (1H, d, J=8.7 Hz). m/z (APCI+) 206 (M+1). HPLC (aqueous 200 Mm ammonium acetate buffer/acetonitrile gradient, 3.0 ml/min, Hewlett Packard ODS Hypersil 5 μM, 125×4 mm column), 4.453 min.

1. temperatureheated to 45° C. for an overnight
2. filtrationThe salts were filtered off
3. washrinsed with ethyl acetate
4. concentrationthe combined filtrate was concentrated down to a residue
5. customThis was chromatographed