تفاعل #351898

معادلة التفاعل

sodium phosphate

adenosine

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

2,6-Diamino-9-(3'-O-propyl-β-D-ribofuranosyl) purine

adenosine

→

product

2'-O-Propylguanosine

المذيبات

DMSO

phosphate

DMSO

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONan addition 24 hrs
2. 2
   أخرىThe solvent was evaporated in vacuo
3. 3
   أخرىthe residue flash chromatographed on silica gel utilizing 5→20% MeOH/CH2Cl2
4. 4
   أخرىProduct-containing fractions were evaporated in vacuo
5. 5
   أخرىthe residue crystallized from H2O

الإجراء التجريبي

A mixture of 2,6-Diamino-9-(2'-O-propyl-β-D-ribofuranosyl) purine and 2,6-Diamino-9-(3'-O-propyl-β-D-ribofuranosyl) purine (4.6 gm) and adenosine deaminase (200 mg, Sigma Chemicals Type II) were stirred at room temperature overnight in 0.1M tris buffer (150 ml, pH 7.4), DMSO (100 ml) and 0.1M sodium phosphate buffer (10 ml). A further aliquot of adenosine deaminase (140 mg) in 0.1M phosphate buffer (30 ml) and DMSO (20 ml) was added and the reaction stirred an addition 24 hrs. The solvent was evaporated in vacuo and the residue flash chromatographed on silica gel utilizing 5→20% MeOH/CH2Cl2. Product-containing fractions were evaporated in vacuo and the residue crystallized from H2O to yield 2.6 gm of product. m.p. dec>270° C. 1H NMR (DMSO-d6) δ 0.75 (t, 3, CH3), 1.42 (tq, 2, CH2), 3.3-3.6 (m, 4, H-5', O--CH2), 3,85 (m, 1), 4.2 (m, 1), 4.23 (m, 1), 5.10 (t, 1, 5'-OH), 5.13 (d, 1, 3'-OH) 5.75 (d, 1, H-1') 6.45 (br s, 2, NH2), 7.95 (s, 1, H-8) and 10.67 (br s, 1, NH). Anal. Calcd. for C13H19N5O5 : C, 47.99; H, 5.89; N, 21.53. Found: C, 47.90, H, 5.85; N, 21.44.

المصدر