Acetic Acid → 5-Amino-3-beta-D-ribofuranosyl-3H-thiazolo[4,5-d]pyrimidin-2-one

HRID 19483

Reaction equation

HRID 19483 reaction equation
[NH2:1][C:2]1[N:3]=[CH:4][C:5]2[S:10][C:9](=[O:11])[N:8]([C@@H:12]3[O:24][C@H:23]([CH2:25][O:26]C(=O)C)[C@@H:18]([O:19]C(=O)C)[C@H:13]3[O:14]C(=O)C)[C:6]=2[N:7]=1.C([O-])([O-])=O.[K+].[K+].CC(O)=O>CO>[NH2:1][C:2]1[N:3]=[CH:4][C:5]2[S:10][C:9](=[O:11])[N:8]([C@@H:12]3[O:24][C@H:23]([CH2:25][OH:26])[C@@H:18]([OH:19])[C@H:13]3[OH:14])[C:6]=2[N:7]=1

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 11430Potassium CarbonateHCID 116332675-Amino-3-(2',3,5'-tri-O-acetyl-beta-D-ribofuranosyl)-3H-thiazolo[4,5-d]pyrimidin-2-one

Product 1

HCID 101931095-Amino-3-beta-D-ribofuranosyl-3H-thiazolo[4,5-d]pyrimidin-2-oneYield 90.1%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 78 (0.52 g, 1.22 mmol) in MeOH (20 mL) was added K2CO3 (25 mg, 0.18 mmol). The reaction was stirred at room temperature overnight, then neutralized with AcOH (21 μL, 0.36 mmol). The resulting mixture was stirred at room temperature for additional 30 min, concentrated, and triturated with H2O (2 ml) to afford 0.33 g of compound 79 (89%) as a white solid: mp 220° C. (Dec); 1H (400 MHz, d6-DMSO) δ 8.34 (s, 1H), 6.85 (s, 2H), 5.90 (d, J=4.8 Hz, 1H), 5.31 (d, J=5.6 Hz, 1H), 4.98 (d, J=5.6 Hz, 1H), 4.81 (q, J=5.2 Hz, 1H), 4.67 (t, J=6.0 Hz, 1H), 4.11 (q, J=5.2 Hz, 1H), 3.77 (dd, J=10.8, 4.8 Hz, 3H), 358 (m, 1H), 3.44 (m, 1H); MS (+)-ES [M+H]+ m/z 301.1. Elemental Analysis calc'd for C10H12N4O5S.0.3H2O: C, 39.29; H, 4.15; N, 18.33; S10.49. Found: C, 39.51; H, 4.18; N, 17.95; S, 10.27.

Workup

  1. stirringThe resulting mixture was stirred at room temperature for additional 30 min
  2. concentrationconcentrated
  3. customtriturated with H2O (2 ml)

Sources & evidence

ORD record
ord-5d49f9c234d5488e963b8d13637dbdaa
Source dataset
uspto-grants-2010_06
Patent number
US07745415B2

Linked notes

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