Ethyl Acetate → (3-Amino-6,7-dihydro-5H-furo[3,2-g]chromen-2-yl)-(3-methoxyl-phenyl)-methanone

関与物質

反応条件

反応手順

To a stirred solution of 7-Hydroxy-chroman-6-carbonitrile from method II-3 (30 mg, 0.17 mmol) and 3-methoxyphenacyl bromide (78.5 mg, 0.34 mmol, 2.0 eq) in anhydrous N,N-dimethylformamide (1.0 mL) was added potassium carbonate (47.3 mg, 0.34 mmol, 2.0 eq), and the orange reaction mixture was stirred at 100° C. for 17 h. The resulting dark wine colored reaction was poured into ethyl acetate (10 mL) and water (10 mL). This mixture was then extracted with EtOAc (2×10 mL). The combined organic layers were then dried (Na2SO4), filtered, and evaporated in vacuo. The residue was purified by pre-HPLC to afford the desired product as a yellow solid (30.7 mg, 54.9%). 1H-NMR (CD3CN) δ 7.73 (d, J=7.3 Hz, 1H), 7.66 (s, 1H), 7.50 (s, 1H), 7.44 (t, 1H), 7.34 (dd, J=2.8, 8.5 Hz, 1H), 6.80 (s, 1H), 4.25 (t, 2H), 3.89 (s, 3H), 2.93 (t, 2H), 2.03 (m, 2H); MS LC-MS (MH+=324).

情報源と証拠