Hydrochloric Acid → N-{3-[3-cyclopropyl-5-(4-ethynyl-2-fluorophenylamino)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydro-2H-pyrido[4,3-d]pyrimidin-1-yl]phenyl}acetamide

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Reaction Steps

To N-{3-[3-cyclopropyl-5-(2-fluoro-4-trimethylsilanylethynylphenylamino)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydro-2H-pyrido[4,3-d]pyrimidin-1-yl]phenyl}acetamide 61 (1.00 g) obtained in Step 2 and potassium carbonate (236 mg) was added methanol/N,N-dimethylformamide [1:1 (volume ratio), 10.0 ml], and the mixture was stirred at room temperature for 20 hrs. The mixture was neutralized with 2N hydrochloric acid, water (10.0 ml) was added, and the mixture was stirred at room temperature for 1 hr. The crystals were collected by filtration and dried to give N-{3-[3-cyclopropyl-5-(4-ethynyl-2-fluorophenylamino)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydro-2H-pyrido[4,3-d]pyrimidin-1-yl]phenyl}acetamide 62 (815 mg, yield 93%) as pale-yellow crystals.

Provenance & Evidence