Diethyl Malonate → 2-{5-[2-(4-Acetylamino-phenylsulfanyl)-5-methyl-phenylamino]-[1,8]naphthyridin-2-yl}-malonic acid diethyl ester

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Reaction Steps

To a slurry of sodium hydride (95%, 0.045 g, 1.8 mmol) in 10 mL anhydrous THF at 0° C. under an atmosphere of N2 was added diethyl malonate (0.32 g, 2.0 mmol) dropwise. The mixture was stirred for 30 minutes at ambient temperature, treated with the product from Example 23a (0.141 g, 0.3 mmol), heated at 110° C. for two hours, cooled and partitioned between EtOAc and water. The ethyl acetate layer was washed with saturated brine, dried over sodium sulfate, filtered and concentrated giving the title compound as a yellow glass, (0.14 g, 84% yield).

Provenance & Evidence