Ethyl bromoacetate → HCID 906979, compound

Participants

Reaction Steps

To a mixture of 7-Hydroxy isoflavone (35 grams, 147 mmol), anhydrous K2CO3 (84 grams, 608 mmol) in anhydrous acetone (500 mL) was added ethyl bromo acetate (29 grams, 174 mmol) and refluxed for 8 hours. Acetone was distilled and water (500 mL) was added. Crude 49 was filtered, dried, and recrystallized from toluene to give pure 49 (33 grams, 72.4%) as a white shining powder. The melting point was found to be 105-106.5° C. The structure was confirmed with IR and NMR. IHNMR (CDCl3) δ 1.31 (t, 3H,OCH2,CH3), 4.30(q, 2H, OCH2, CH3), 4.70(s, 2H,OCH2), 6.84 (d, 1H,Ar), 7.05 (dd,1H,Ar), 7.41 (m, 3H,Ar), 7.57 (m, 2H,Ar), 7.97(s, 1H, Pyran), 8.24(d,1H,Ar).

Provenance & Evidence