[(3aR,4R,6R,6aS)-6-(6-chloro-9H-purin-9-yl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methyl acetate → [(3aR,4R,6R,6aS)-6-(6-isobutyl-9H-purin-9-yl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methyl acetate

HRID 552725

Reaction equation

HRID 552725 reaction equation
[C:1]([O:4][CH2:5][C@@H:6]1[C@@H:13]2[C@@H:9]([O:10][C:11]([CH3:15])([CH3:14])[O:12]2)[C@H:8]([N:16]2[CH:24]=[N:23][C:22]3[C:17]2=[N:18][CH:19]=[N:20][C:21]=3Cl)[CH2:7]1)(=[O:3])[CH3:2].[Br-].[CH2:27]([Zn+])[CH:28]([CH3:30])[CH3:29]>C1COCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([O:4][CH2:5][C@@H:6]1[C@@H:13]2[C@@H:9]([O:10][C:11]([CH3:15])([CH3:14])[O:12]2)[C@H:8]([N:16]2[CH:24]=[N:23][C:22]3[C:17]2=[N:18][CH:19]=[N:20][C:21]=3[CH2:27][CH:28]([CH3:30])[CH3:29])[CH2:7]1)(=[O:3])[CH3:2]

Participants

5

Reactant 2

HCID 86607316[(3aR,4R,6R,6aS)-6-(6-chloro-9H-purin-9-yl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methyl acetateHCID 178448254HCID 178448254, compound

Product 1

HCID 67165669[(3aR,4R,6R,6aS)-6-(6-isobutyl-9H-purin-9-yl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methyl acetateYield 45%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
60 °C

Procedure

To a solution of [(3aR,4R,6R,6aS)-6-(6-chloro-9H-purin-9-yl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methyl acetate (250.0 mg, 0.68 mmol) in degassed THF (6 mL) under nitrogen was added Pd(PPh3)4 (44 mg, 0.038 mmol) followed by 0.5 M of isobutylzinc bromide in tetrahydrofuran (2.04 mL) dropwise over 15 min. The reaction was heated at 60° C. for 1 hour. The reaction was cooled then quenched with saturated aq NH4Cl, extracted with EtOAc and the organic phase was washed with saturated aq EDTA.Na2 solution then water. The organic phase was concentrated and the residue purified by flash chromatography (0 to 100% EtOAc/DCM) to provide the title compound (120 mg, 45%).

Workup

  1. temperatureThe reaction was cooled
  2. customthen quenched with saturated aq NH4Cl
  3. extractionextracted with EtOAc
  4. washthe organic phase was washed with saturated aq EDTA
  5. concentrationThe organic phase was concentrated
  6. customthe residue purified by flash chromatography (0 to 100% EtOAc/DCM)

Sources & evidence

ORD record
ord-e2a4ea5ed84744fba7c1d2065205bbe5
Source dataset
uspto-grants-2011_05
Patent number
US07951810B2

Linked notes

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