反应详情

A solution of (S)-2-amino-6-chloro-9-(2,2-dimethyl-1,3-dioxolan-4-ylmethoxy)purine (250 mg, 0.83 mmol) in 80% acetic acid (20 ml) was stirred at 25° C. for 2 h. and then at 70° C. for 1 h. The solution was evaporated to dryness under reduced pressure, the residue absorbed on silica and chromatographed eluting with acetone-hexane 3:1 affording (S)-2-amino-6-chloro-9-(2,3-dihydroxyprop-1-oxy)purine (170 mg, 78%) as a white solid; m.p. 155°-8° C. υmax (KBr) 3340, 3200, 1660, 1620, 1560, 1520 1470 cm-1 ; δH[(CD3)2SO] 3.41(2H,m,CH2OH) 3.78(1H,m,CH), 4.19(1H,q,J7.4,10.4 Hz,CH2ON), 4.40(1H,q,J3.3,10.4 Hz,CH2ON), 4.73(1H,t,J5.0 Hz,D2O exchangeable, OH), 5.14(1H,d,J5.0 Hz.D2O exchangeable, OH), 7.12(2H,S,D2O exchangeable, NH2) 8.35(1H,S,H-8). Found M+ 259.0475; C8H10ClN5O3 requires M+ 259.0472.

1. customThe solution was evaporated to dryness under reduced pressure
2. customthe residue absorbed on silica
3. customchromatographed
4. washeluting with acetone-hexane 3:1 affording (S)-2-amino-6-chloro-9-(2,3-dihydroxyprop-1-oxy)purine (170 mg, 78%) as a white solid