Ammonia → 5-Fluoro-2'-O-methyluridine

HRID 2210629Notes

Reaction equation

HRID 2210629 reaction equation
C([O:9][C@@H:10]1[C@@H:14]([CH2:15][O:16]C(=O)C2C=CC=CC=2)[O:13][C@@H:12]([N:25]2[CH:32]=[C:31]([F:33])[C:29](=[O:30])[NH:28][C:26]2=[O:27])[C@@H:11]1[O:34][CH3:35])(=O)C1C=CC=CC=1.N>CO>[CH3:35][O:34][C@@H:11]1[C@H:10]([OH:9])[C@@H:14]([CH2:15][OH:16])[O:13][C@H:12]1[N:25]1[CH:32]=[C:31]([F:33])[C:29](=[O:30])[NH:28][C:26]1=[O:27]

Participants

4

Reactant 2

HCID 222AmmoniaHCID 10005546[(2R,3R,4R,5R)-3-benzoyloxy-5-(5-fluoro-2,4-dioxopyrimidin-1-yl)-4-methoxyoxolan-2-yl]methyl benzoate

Product 1

HCID 217323735-Fluoro-2'-O-methyluridineYield 98%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

3',5'-Di-O-benzoyl-2'-O-methyl-5-fluorouridine (9.6 g, 20 mmoles) was dissolved in methanol (350 ml) which had been previously saturated with ammonia at -20° C. The solution was sealed in a stainless steel bomb at room temperature for 17 hours and then concentrated to an oil under reduced pressure. The oil was chromatographed on silica gel (200 g) using ethyl acetate to give 5.4 g (98%) of 2'-O-methyl-5-fluorouridine as a white solid. A portion (0.5 g) was crystallized from ethyl acetate/toluene to yield 0.4 g of white needles as the analytical sample, mp 151°-152° C. (lit. M. J. Robins, et. al., J. Am. Chem. Soc., 89, 7381 (1976)., mp 144°-147° C.). 1H NMR (DMSO-d6): δ 3.39 (s, 3H, OCH3), 3.5-3.7 (m, 2H, H-5'), 3.7-3.9 (m, 2H, H-3',4'), 4.13 (m, 1H, H-2'), 5.18 (d, J=6 Hz, 1H, 3'--OH), 5.35 (br t, 1H, 5'--OH), 5.81 (dd, 1H, H-1'), 8.35 (d, J=7 Hz, 1H, H-6), 11.40 (br d, 1H, N--H). Anal. Calcd for C10H13N2O6 (276.22): C, 43.48; H, 4.74; N, 10.14. Found: C, 43.56; H, 4.63; N, 10.02.

Workup

  1. concentrationconcentrated to an oil under reduced pressure
  2. customThe oil was chromatographed on silica gel (200 g)

Sources & evidence

ORD record
ord-609fcb5709f64136b1c8d23cf9f89029
Source dataset
uspto-grants-1995_10
Patent number
US05459243

Reaction notes

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