Potassium Carbonate → 2-Chloro-4-(4-methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidine

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Reaction Steps

To a solution of 2,4-dichloro-thieno[3,2-d]pyrimidine (0.20 g, 1.0 mmol) in EtOH (3.2 mL) was added K2CO3 (0.31 g, 2.2 mmol) followed by N-methylpiperazine (0.13 mL, 1.2 mmol). After stirring at rt for 12 h, the mixture was filtered to afford 0.23 g of the desired product. MS: 269.0. 1H NMR (400 MHz, CD3OD) 8 ppm 8.06 (d, J=5.6 Hz, 1H), 7.27 (d, J=5.6 Hz, 1H), 4.05-4.00 (m, 4H), 2.62-2.56 (m, 4H), 2.36 (s, 3H).

Provenance & Evidence