Piperazine → 4-Chloro-5-methoxy-6-(piperazin-1-yl)pyrimidine

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Reaction Steps

Piperazine (6.00 g, 70 mmol, 6.25 eq) is dissolved in water (30 ml), and to this solution is added 4,6-dichloro-5-methoxypyrimidine (2.00 g, 11.2 mmol, 1.0 eq). The mixture is stirred vigorously at room temperature for 2.0 h, during which 4,6-dichloro-5-methoxypyrimidine is gradually dissolved. The aqueous phase is extracted with CH2Cl2 (25 ml*2). The extracted liquids are combined, dried over anhydrous sodium sulfate and filtered by vacuum filtration, and concentrated to give a light yellow oily crude product (2.66 g).

Provenance & Evidence