Piperidine → 1,3-Di-n-butyl-8-piperidino Xanthine
Reaktionsgleichung
[CH2:1]([N:5]1[C:14](=[O:15])[C:13]2[NH:12][C:11](Br)=[N:10][C:9]=2[N:8]([CH2:17][CH2:18][CH2:19][CH3:20])[C:6]1=[O:7])[CH2:2][CH2:3][CH3:4].[NH:21]1[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]1>C1(C)C=CC=CC=1>[CH2:1]([N:5]1[C:14](=[O:15])[C:13]2[NH:12][C:11]([N:21]3[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]3)=[N:10][C:9]=2[N:8]([CH2:17][CH2:18][CH2:19][CH3:20])[C:6]1=[O:7])[CH2:2][CH2:3][CH3:4]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
1,3-Di-n-butyl-8-bromo xanthine (2 g, 0.0029 mol) was dissolved in toluene (50 ml). After addition of piperidine (5 g, 0.0058 mol) the mixture was refluxed for 9 hours. The reaction mixture was then extracted with water (4×30 ml), the organic layer dried over anhydrous sodium sulphate and the solvent removed in vacuo. The residue was recrystallised from ethanol to give the title product, yield 0.4 g (20%), m.pt. 221° C.