Triethylamine → 6-(cyclopropylmethylamino)-9-[(2R,5S)-5-[(heptanoyloxy)methyl]-tetrahydro-2-furyl]-9H-purine

HRID 974264Notes

Reaction equation

HRID 974264 reaction equation
[CH:1]1([CH2:4][NH:5][C:6]2[N:14]=[CH:13][N:12]=[C:11]3[C:7]=2[N:8]=[CH:9][N:10]3[C@H:15]2[CH2:19][CH2:18][C@@H:17]([CH2:20][OH:21])[O:16]2)[CH2:3][CH2:2]1.C(N(CC)CC)C.[C:29](Cl)(=[O:36])[CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH3:35]>CN(C)C1C=CN=CC=1.C(#N)C>[CH:1]1([CH2:4][NH:5][C:6]2[N:14]=[CH:13][N:12]=[C:11]3[C:7]=2[N:8]=[CH:9][N:10]3[C@H:15]2[CH2:19][CH2:18][C@@H:17]([CH2:20][O:21][C:29](=[O:36])[CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH3:35])[O:16]2)[CH2:2][CH2:3]1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 17313Heptanoyl chlorideHCID 18649770HCID 18649770, compound

Product 1

HCID 566244516-(cyclopropylmethylamino)-9-[(2R,5S)-5-[(heptanoyloxy)methyl]-tetrahydro-2-furyl]-9H-purineYield 51.4%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6342AcetonitrileSolvent

Procedure

6-(Cyclopropylmethylamino)-9-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furyl]-9H-purine (0.310 g, 1.1 mmoles), 4-dimethylaminopyridine (10 mg, 0.1 mmoles, Aldrich Chemical Co., Madison, Wis.), and triethylamine (1.0 mL, 7 mmoles, Aldrich Chemical Co., Madison, Wis.) were dissolved in 50 mL acetonitrile. Heptanoyl chloride (800 μm, 5.0 mmoles, Aldrich Chemical Co., Madison, Wis.) was added and the reaction was stirred at room temperature for 6 hours. The reaction was quenched with methanol and solvents were evaporated in vacuo. The residue was dissolved in acetone and passed over a silica gel column (4.8×13 cm). The product containing fractions were combined, concentrated, and loaded onto preparative silica gel plates (20×20×0.2 cm). The plates were developed in a mixture of chloroform:acetone (80:20). The product was scraped from the preparative plate (Rf 0.5) and eluted from the silica gel with ethanol. After evaporation of the solvent the product was further purified on a Chromatotron (2 mm silica gel plate) with a mixture of hexane:acetone (80:20). Lyophilization afforded 0.227 g of 6-(cyclopropylmethylamino)-9-[(2R,5S)-5-[(heptanoyloxy)methyl]-tetrahydro-2-furyl]-9H-purine as an oil (51% yield).

Workup

  1. customThe reaction was quenched with methanol and solvents
  2. customwere evaporated in vacuo
  3. dissolutionThe residue was dissolved in acetone
  4. additionThe product containing fractions
  5. concentrationconcentrated
  6. additionThe plates were developed in a mixture of chloroform:acetone (80:20)
  7. washeluted from the silica gel with ethanol
  8. customAfter evaporation of the solvent the product
  9. customwas further purified on a Chromatotron (2 mm silica gel plate) with a mixture of hexane:acetone (80:20)

Sources & evidence

ORD record
ord-e7acfd775fd046f585dadb14541c7014
Source dataset
uspto-grants-1991_11
Patent number
US05068320

Reaction notes

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