Tetrahydrofuran → 2-(5,6,7,8-Tetrahydroimidazo[1,2-a]pyrazin-7-yl)-4-(3-chloro-4-methoxybenzylamino)-5-carboxypyrimidine

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Reaction Steps

2-(5,6,7,8-Tetrahydroimidazo[1,2-a]pyrazin-7-yl)-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine (prepared in Example 97) 290 mg and 2N aqueous sodium hydroxide solution 1.64 ml are suspended in dimethyl sulfoxide-water (5 ml:1 ml) and stirred at room temperature for 1 hour. Tetrahydrofuran 5 ml is added thereto and the mixture is stirred at room temperature for 13 hours. After removal of tetrahydrofuran in vacuo, the residue is diluted with water and neutralized with a 10% aqueous citric acid solution. The precipitate is collected, washed with water, methanol and isopropyl ether to give 2-(5,6,7,8-tetrahydroimidazo[1,2-a]pyrazin-7-yl)-4-(3-chloro-4-methoxybenzylamino)-5-carboxypyrimidine as a colorless crystalline powder, 187 mg. mp 223-226° C. (decomposition), MS(m/z): 413(M−H)−

Provenance & Evidence