Phosphorus sulfide (P2S5) → HCID 118599135, compound

Participants

Reaction Conditions

Reaction Steps

A vial was charged with 3-chloro-6-oxo-5-(pyrimidin-4-ylamino)-1,6-dihydropyridine-2-carboxylate (3, 0.35, 1.2 mmol) and pyridine (10 mL) was added. To the above mixture phosphorus pentasulfide (0.53 g, 2.4 mmol) was added and reaction was heated at 110° C. for 16 h. TLC showed presence of starting material and phosphorus pentasulfide (0.265 g, 1.2 mmol) was added again and heated the reaction to 115° C. for 24 h. The pyridine was removed under reduced pressure and water (20 mL) was added and extracted with 5% methanol in dichloromethane (100 mL). The organic layer was washed with sodium bicarbonate and brine and layer was concentrated to dryness to afford ethyl 3-chloro-5-(pyrimidin-4-ylamino)-6-thioxo-1,6-dihydropyridine-2-carboxylate (4) as brownish yellow solid and used directly without further purification. Yield: 350 mg, crude; MS (ESI) m/z 310.94 [M+1]+.

Provenance & Evidence