Dimethyl Sulfoxide → 2'-O-Octadecylguanosine

Participants

Reaction Steps

2,6-Diamino-9-(2'-O-octadecyl-β-D-ribofuranosyl)purine (10 g) in 0.1 M sodium phosphate buffer (50 ml, pH 7.4), 0.1 M tris buffer (1000 ml, pH 7.4) and DMSO (1000 ml) was treated with adenosine deaminase (1.5 g) as per the procedure of Example 3. At day 3, day 5 and day 7 an additional aliquot (500 mg, 880 mg and 200 mg, respectively) of adenosine deaminase was added. The reaction was stirred for a total of 9 day and after purification by silica gel chromatography yielded the product (2 g). An analytical sample was recrystallized from MeOH 1H NMR (DMSO-d6) δ 0.84 (t, 3, CH3), 1.22 [s, 32, O--CH2 --CH2 --(CH2)16 ], 5.07 (m, 2, 3'-OH5'-OH); 5.78 (d, 1, 1'-H); 6.43 (s, 2, NH2), 7.97 (s, 1, 8-H) and 10.64 (s, 1, NH2). Anal. Calcd. for C28H49N5O5 : C, 62.80; H, 9.16; N, 12.95. Found: C, 62.54; H, 9.18; N, 12.95.

Provenance & Evidence