Potassium Carbonate → 6-[4-(3-phthalimidopropyloxy)phenyl]-4,5-dihydro3(2H)-pyridazinone

Participants

Reaction Conditions

Reaction Steps

A mixture of 2.00 9 (10.5 mmol) of 6-(4-hydroxyphenyl)-4,5-dihydro-3(2H)-pyridazinone, prepared as described in Example 13, 1.60 g (11.6 mmol) of anhydrous K2CO3, and 3.39 (1.26 mmol) of N-(bromopropyl)phthalimide in 43 ml of DMF is heated at 100° C. for 3 hrs under N2. The DMF is removed under vacuum and the residue taken up in 125 ml of EtOAc and 50 ml of water. The organic phase is washed with 50 ml of 5% aqueous NaOH, then with saturated NaCl, dried (MgSO4), and the solvent removed to leave a yellow solid. This solid is recrystallized from EtOAc to give 2.748 g of 6-[4-(3-phthalimidopropyloxy)phenyl]-4,5-dihydro-(2H)-pyridazinone as a white solid. Yield, 69%.

Provenance & Evidence