Pyridine → ((3aR,4R,6R,6aR)-6-(6-chloro-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl acetate

HRID 552716Notes

Reaction equation

HRID 552716 reaction equation
[Cl:1][C:2]1[N:10]=[CH:9][N:8]=[C:7]2[C:3]=1[N:4]=[CH:5][N:6]2[C@H:11]1[C@@H:15]2[O:16][C:17]([CH3:20])([CH3:19])[O:18][C@@H:14]2[C@@H:13]([CH2:21][OH:22])[O:12]1.N1C=CC=CC=1.[C:29](OC(=O)C)(=[O:31])[CH3:30]>CN(C)C1C=CN=CC=1.C(Cl)Cl>[C:29]([O:22][CH2:21][C@@H:13]1[C@@H:14]2[C@@H:15]([O:16][C:17]([CH3:19])([CH3:20])[O:18]2)[C@H:11]([N:6]2[CH:5]=[N:4][C:3]3[C:7]2=[N:8][CH:9]=[N:10][C:2]=3[Cl:1])[O:12]1)(=[O:31])[CH3:30]

Participants

6

Reactant 3

HCID 1049PyridineHCID 7918Acetic AnhydrideHCID 117271506-Chloro-9-[2,3-O-(1-methylethylidene)-beta-D-ribofuranosyl]-9H-Purine

Product 1

HCID 86607315((3aR,4R,6R,6aR)-6-(6-chloro-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl acetateYield 100%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

[(3aR,4R,6R,6aR)-6-(6-Chloro-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]methanol (1.000 g, 0.003060 mol), pyridine (495.1 μL, 0.006121 mol), 4-dimethylaminopyridine (0.0748 g, 0.000612 mol) and acetic anhydride (577.5 μL, 0.006121 mol) were stirred in methylene chloride (20 mL) at room temperature for 1 h. The solution was diluted with Methylene chloride, extracted with HCl 1N, dried over NA2SO4 and concentrated in vacuo. The residue was purified by flash chromatography (EtOAc/DCM 0% to 25%) to obtain the product (1.129 g, 84%) as an oil.

Workup

  1. extractionextracted with HCl 1N
  2. customdried over NA2SO4
  3. concentrationconcentrated in vacuo
  4. customThe residue was purified by flash chromatography (EtOAc/DCM 0% to 25%)

Sources & evidence

ORD record
ord-413af879f45144f49a3acb7955a4bea1
Source dataset
uspto-grants-2011_05
Patent number
US07951810B2

Reaction notes

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