Hydrochloric Acid → 6-[(2,2-Diphenylethyl)amino]-N-[2-(1-piperidinyl)ethyl]-9H-purine-2-carboxamide

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Reaction Steps

A solution of 6-[(2,2-diphenylethyl)amino]-N-[2-(1-piperidinyl)ethyl]-9-tetrahydro-2H-pyran-2-yl-9H-purine-2-carboxamide (Preparation 5) (420 mg, 0.76 mmol) in ethanol (20 ml) was treated with hydrochloric acid (2 M, 0.9 ml). The mixture was heated at reflux for 30 minutes after which time a white precipitate had formed. The mixture was cooled to room temperature and the solvent was removed under reduced pressure. The residue was partitioned between dichloromethane and 10% weight by volume aqueous ammonia. The organic phase was separated, dried over anhydrous magnesium sulphate, filtered and evaporated under reduced pressure to afford the title compound as a white solid (319 mg).

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