Reacción #429099

Ecuación de reacción

NaH

2,6-Diamino-9-(β-D-ribofuranosyl)purine

sodium hydride

bromononane

→

mixture

Rendimiento 39.4%

2,6-Diamino-9-(2'-O-nonyl-β-D-ribofuranosyl)purine

Rendimiento 39.4%

Disolventes

DMF

DMF

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroto yield 83 g of crude product
2. 2
   Otro50 g of crude product was purified by silica gel chromatography
3. 3
   workup.ADDITIONFraction containing 2'-O-nonyl and 3'-O-nonyl product

Procedimiento

2,6-Diamino-9-(β-D-ribofuranosyl)purine (50 g, 180 mmol) was treated with sodium hydride (8.8 g, 220 mmol) and bromononane (59 g, 54.4 ml, 285 mmol) in DMF (700 ml) as per the procedure of Example 2 (the diamino compound in DMF was cooled in an ice bath during the addition of NaH) to yield 83 g of crude product. 50 g of crude product was purified by silica gel chromatography. Fraction containing 2'-O-nonyl and 3'-O-nonyl product were combined to give a 77:23 mixture (29 g) of the 2' and 3' product. Pure 2'-O-nonyl product is obtained by chromatography. 1H NMR (DMSO-d6) δ0.95 (t, 3, CH3); 1.17 [m, 12, O--CH2 --CH2 --(CH2)6 ]; 1.42 [m, 2, O--CH2CH2 (CH2)6 ]; 3.27-3.70 (m, 2, H-5'); 3.50-3.70 [m, 2, O--CH2 (CH2)7 ]; 3.95 (m, 1, H-4'), 4.24 (m, 1, H-3'); 4.40 (m, 1, H-2'); 5.10 (d, 1, 3'-OH, J=5 Hz); 5.50 (t, 1, 5'-OH, J=6 Hz); 5.76 (s, 2, 2-NH2); 5.83 (d, 1, H-1', J=6.0 Hz); 6.81 (s, 2, 6-NH2); and 7.96 (s, 1, 8-H).

Fuente