Isopropyl iodide → HCID 23505644, compound

Participants

Reaction Steps

To a suspension of sodium hydride (60% dispersion, 44 mg, 1.07 mmol) in 1 mL of DMF was added a suspension of 6,7-ethylenedioxy-4-phenylquinazolin-2(1H)-one (100 mg, 0.36 mmol) in 4 mL of DMF and stirred at rt for 15 min. 2-Iodopropane (150 μL, 1.45 mmol) was then added and the mixture was heated to 60-70° C. for 1.5 h. Excess sodium hydride Was quenched with water and the solution extracted with 25 mL of 9:1 EtOAc:hexane. The extract was washed with 2×25 mL water and brine, then dried with MgSO4 and concentrated in vacuo. The crude solid was subjected to flash column chromatography eluting with acetone:hexane to give the title compound 6,7-ethylenedioxy-2-isopropoxy-4-phenylquinazoline (95 mg, 83%). 1H NMR (CDCl3): 7.75 (d, 2H), 7.52 (m, 3H), 7.44 (s, 1H), 7.29 (s, 1H), 5.49 (m, 1H), 4.43-4.30 (m, 4H), 1.46 (d, 6H), followed by the title compound 6,7-ethylenedioxy-1-isopropyl-4-phenylquinazolin-2(1H)-one (9 mg, 8%). 1H NMR (CDCl3): 7.70 (d, 2H), 7.50 (m, 3H), 7.30 (s, 1H), 7.05 (s, 1H), 5.15 (m, 1H), 4.41-4.26 (m, 4H), 1.68 (d, 6H).

Provenance & Evidence