Hydrochloric Acid → 7-Benzyl-3-pentyl-6-thioxo-1,3,6,7-tetrahydro-2H-purin-2-one

Participants

Reaction Conditions

Reaction Steps

7-Benzyl-3-pentyl-3,7-dihydro-1H-purine-2,6-dione (2.0 g, 6.4 mmol) and phosphorus pentasulfide (3.0 g, 6.7 mmol) were mixed in 1,4-dioxane (20 mL). After stirring at 100° C. for 6 h, the reaction mixture was treated with a 2 M solution of sodium hydroxide in water (20 mL). Then the reaction mixture was adjusted to be acidic (pH ˜4) with 2 N HCl and extracted with EtOAc. The organic layer was concentrated, and the solid formed was washed with ether to provide the product as a yellow solid (1.30 g, 61.8% yield). LCMS calculated for C17H21N4OS (M+H): 329.1; found: 329.1.

Provenance & Evidence