Réaction #3733

Équation de réaction

1,3-Di-n-butyl-8-bromo xanthine

piperidine

→

title product

1,3-Di-n-butyl-8-piperidino Xanthine

Solvants

toluene

Conditions de réaction

Traitement

1. 1
   Températurewas refluxed for 9 hours
2. 2
   ExtractionThe reaction mixture was then extracted with water (4×30 ml)
3. 3
   Séchagethe organic layer dried over anhydrous sodium sulphate
4. 4
   Autrethe solvent removed in vacuo
5. 5
   AutreThe residue was recrystallised from ethanol

Mode opératoire

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.

Source