Sodium Hydroxide → 2-(2-fluorophenyl)-7,8,9,10-tetrahydro-imidazo[1,2-c]pyrido[3,4-e]pyrimidin-5(6H)-one

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Reaction Steps

To a solution of 9-Benzoyl-2-(2-fluorophenyl)-7,8,9,10-tetrahydroimidazo[1,2-c]pyrido[3,4-e]pyrimidin-5(6H)-one (435 mg. 1.1 mmol) in ethanol (5 mL) was added 5 mL of 50% aqueous sodium hydroxide. The mixture was refluxed for about 1 hour, and then poured into saturated aqueous ammonium chloride and extracted twice with 10% methanol/ethyl acetate. The combined organic layers were dried over magnesium sulfate, filtered, concentrated, and triturated with methanol/ether to give 2-(2-fluorophenyl)-7,8,9,10-tetrahydro-imidazo[1,2-c]pyrido[3,4-e]pyrimidin-5(6H)-one, m.p.>310° C.

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