Nitric Acid → 1,3-Di-n-butyl-8-nitro Xanthine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

1,3-Di-n-butylxanthine (73 g, 0.28 mol) was dissolved in acetic acid (120 ml) and then treated with concentrated nitric acid (49 g) at 87° C. After 1 hour, the mixture was cooled to 5° C., the resulting yellow precipitate filtered off and washed with water (50 ml). The yellow crystals were dissolved in dichloromethane and washed twice with water. The separated organic layer was then dried (anhydrous sodium sulphate) and concentrated to give a crystalline product, yield 73 g (86%), m.pt 168° C.

Herkunft & Nachweise