Sodium Nitrite → HCID 11617472, compound

Participants

Reaction Steps

2-(4-methoxybenzylsulfanyl)-4-methylamino-6-morpholinopyrimidine (5.0 g, 14.4 mmol) was dissolved in acetic acid (50 ml), and an aqueous solution (10 ml) of sodium nitrite (1.49 g, 21.6 mmol) was added drop-wise under water cooling and stirred at room temperature for 5 hours. After distilling away acetic acid under reduced pressure and dissolving the residue in ethyl acetate, washing was performed in the order of 2N—NaOH solution and water, then dried with MgSO4 and the solvent was distilled away under reduced pressure. The residue was dissolved in ethyl acetate (100 ml), 1.0 g of Pd/C was added and catalytic hydrogenation was performed under normal pressure for 4 hours. Celite was used to filter off Pd/C and the filtrate was distilled away under reduced pressure. Separation and purification were performed by silica gel column chromatography (ethyl acetate:hexane=2:1) to obtain 1.28 g (25% yield) of 5-amino-2-(4-methoxybenzylsulfanyl)-6-methylamino-4-morpholinopyrimidine. Melting point: 79.5 to 84° C. MS m/z: 361 (M+).

Provenance & Evidence