Water → 1,3-Di-cyclopropylmethyl-8-chloroxanthine
反応式
[CH:1]1([CH2:4][N:5]2[C:14](=[O:15])[C:13]3[NH:12][C:11]([N+]([O-])=O)=[N:10][C:9]=3[N:8]([CH2:19][CH:20]3[CH2:22][CH2:21]3)[C:6]2=[O:7])[CH2:3][CH2:2]1.O(Cl)[Cl:24].O>CN(C)C=O>[CH:1]1([CH2:4][N:5]2[C:14](=[O:15])[C:13]3[NH:12][C:11]([Cl:24])=[N:10][C:9]=3[N:8]([CH2:19][CH:20]3[CH2:22][CH2:21]3)[C:6]2=[O:7])[CH2:3][CH2:2]1参加物
5
実験手順
1,3-Di-cyclopropylmethyl-8-nitro xanthine (6 g, 0,023 mol) was dissolved in dimethylformamide (20 ml) and reacted with phosporous oxychloride (14 g) for 1 hour at 120° C. The mixture was then treated with water and stirred for 1 hour at room temperature. The precipitate was filtered off, dissolved in ethyl acetate, dried over anhydrous sodium sulphate and the solvent was removed in vacuo, yield 2.5 g (40%), m.pt. 220° C.