Triethylamine → HCID 56605928, compound

HRID 974266Notes

Reaction equation

HRID 974266 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:34])[CH2:30][CH2:31][CH2:32][CH3:33]>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:34])[CH2:30][CH2:31][CH2:32][CH3:33])[O:16]2)[CH2:2][CH2:3]1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 61186Valeryl chlorideHCID 18649770HCID 18649770, compound

Product 1

HCID 56605928HCID 56605928, compoundYield 59%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6342AcetonitrileSolvent

Procedure

6-(Cyclopropylmethylamino)-9-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furyl]-9H-purine (0.624 g, 2.1 mmoles), 4-dimethylaminopyridine (27 mg, 0.2 mmoles, Aldrich Chemical Co., Madison, Wis.), and triethylamine (2.0 mL, 14 mmoles, Aldrich Chemical Co., Madison, Wis.) were dissolved in 100 mL acetonitrile. Valeryl chloride (1.08 mL, 8.9 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). After evaporation of the solvent, the product was further purified on a Chromatotron (4 mm silica gel plate) with a mixture of hexane:acetone (85:15). 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 and eluted from the silica gel with ethanol. The product was then flash chromatographed on a silica gel column (2.5×40 cm) with a mixture of chloroform:acetone (95:5). Lyophilization afforded 0.463 g of 6-(cyclopropylmethylamino)-9-((2R,5S)-5-((pentanoyloxy)methyl)-tetrahydro-2-furyl)-9H-purine as an oil (58% yield).

Workup

  1. customThe reaction was quenched with methanol and solvents
  2. customwere evaporated in vacuo
  3. dissolutionThe residue was dissolved in acetone
  4. customAfter evaporation of the solvent
  5. customthe product was further purified on a Chromatotron (4 mm silica gel plate) with a mixture of hexane:acetone (85:15)
  6. additionThe product containing fractions
  7. concentrationconcentrated
  8. additionThe plates were developed in a mixture of chloroform-acetone (80:20)
  9. washeluted from the silica gel with ethanol
  10. customflash chromatographed on a silica gel column (2.5×40 cm) with a mixture of chloroform:acetone (95:5)

Sources & evidence

ORD record
ord-3b5f6797578b45888b5f4ec4639b9a83
Source dataset
uspto-grants-1991_11
Patent number
US05068320

Reaction notes

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