REFERENCES
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- Azhayeva , E. , Azhayev , A. , Guzaev , A. and Lonnberg , H. 1995 . Nucleic Acids Res. , 23 : 4255 – 4261 .
- Azhayev Guzaev , A. , Hovinen , J. , Azhayeva , E. and Lönnberg , H. 1993 . Tetrahedron Lett. , 34 : 6435 – 6438 .
- Azhayev , A. , Guzaev , A. , Hovinen , J. , Mattinen , J. , Siillanpää , R. and Lönnberg , H. 1994 . Synthesis , : 396 – 400 .
- Compound 2: 31P NMR (CDCl3): 148.94 (0.5 P); 148.71 (0.5 P)
- Hovinen , J. and Salo , H. 1997 . J. Chem. Soc. Perkin Trans. , I in press
- Ethyl[2–deoxy-5–O-(4, 4′-dimethoxytrityl)-β-D-erythro-pentofuranosyl] levulinate: 1H NMR (CDC13):7.47 -8.80 (13H, m, arom.); 4.20 (4H, m, H-1, H-3, -CH2OCO-), 3.90 (1H, m, H-4), 3.78 (6H, s, -OCH3); 3.20 (1H, dd, J4,5a =4.6 Hz, y5a,5b =9.8 Hz, H-5a); 3.07 (1H, dd, J4,5b=5.6 Hz, J5a,5b=9.8 Hz, H-5b); 2.73 (2H, t, J=6.3 Hz, -CH2COO-); 2.55 (2H, t, J=6.3 Hz, -CH2CO-); 2.20 (1H, d, J=3.6 Hz, 3–OH); 2.17(3H, s, COCH3); 1.98 (1H, ddd, J2a, 3=1.9 Hz, J2a, CH2=3.6 Hz, J2a,2b=10.7 Hz, H-2a); 1.89 (2H, m, -CH2–); 1.75 1H, m, H-2b)
- Compound 4: 1H NMR (CDCl3): 7.43 − 6.73 (13H, m arom.); 4.32 (2H, t, J=5.4 Hz, LvOCH2–); 4.16 − 4.06 (3H, m, -CH2NN); 3.83 (2H, t, J=4.9 Hz, HOCH2–); 3.78 (6H, s, -OCH3); 3.41 (2H, t, J=5.1 Hz, DMTrOCH2); 2.65 (2H, t, J=6.6 Hz, -OCOCH2); 2.43 (2H, t, J=6.9 Hz, CH3COCH2–); 2.13 (3H, s, CH3–)
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- Compound 3: 31P NMR (CDC13): 149.17 (0.5 P); 149.05 (0.5 P)
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