Reaktion #6346

Reaktionsgleichung

KBr

9-benzyloxy-6-chloropurine

ammonia

→

9-Benzyloxyadenine

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling the suspension
2. 2
   Sonstigewas evaporated to dryness
3. 3
   Sonstigethe residue partitioned between chloroform (750 ml) and water (500 ml)
4. 4
   WaschenThe separated aqueous phase was washed with chloroform (200 ml)
5. 5
   WaschenThe combined organic phases were washed with water
6. 6
   Trocknendried (MgSO4)
7. 7
   Sonstigeevaporated
8. 8
   Sonstigeaffording an orange solid homogeneous on t.l.c

Vorschrift

A solution of 9-benzyloxy-6-chloropurine (38.4 g; 0.147 mmol) in ethanol (300 ml) saturated with ammonia was heated at 100° C. in an autoclave for 16 hours. After cooling the suspension was evaporated to dryness and the residue partitioned between chloroform (750 ml) and water (500 ml). The separated aqueous phase was washed with chloroform (200 ml). The combined organic phases were washed with water, dried (MgSO4) and evaporated, affording an orange solid homogeneous on t.l.c. (31.1 g, 87%). IR: νmax (KBr) 3372, 3300, 3187, 3038, 1660, 1637, 1600, 1581 cm-1 ; 1H NMR: δH [(CD3)2SO] 5.3(2H, s, CH2Ar), 6.8(2H, br.s, D2O exchangeable, NH2), 7.3(6H, s, H-8, Ar), 7.7(1H, s, H-2). Found: C, 59.39; H, 4.60; N, 29.07%; m/e 241 0949. C12H11N5O requires: C, 59.73; H, 4.60; N, 29.03%; m/z 241.0964.

Quelle