Triethylamine → HCID 56617740, compound

HRID 974262Notes

Reaction equation

HRID 974262 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:35])[CH2:30][CH2:31][CH2:32][CH2:33][CH3:34]>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:35])[CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])[O:16]2)[CH2:2][CH2:3]1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 67340Hexanoyl chlorideHCID 18649770HCID 18649770, compound

Product 1

HCID 56617740HCID 56617740, compoundYield 40.7%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6342AcetonitrileSolvent

Procedure

6-(Cyclopropylmethylamino)-9-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furyl]-9H-purine (0.503 g, 1.7 mmoles), triethylamine (2.0 mL, 14 mmoles, Aldrich Chemical Co., Madison, Wis.), and 4-dimethylaminopyridine (10 mg, 0.1 mmoles, Aldrich Chemical Co., Madison, Wis.) were dissolved in 50 mL acetonitrile. Hexanoyl chloride (980 μl, 7.0 mmoles, Aldrich Chemical Co., Madison, Wis.) was added and the reaction was stirred at room temperature for 3 hours. The reaction was quenched with methanol and solvents were evaporated in vacuo. The residue was dissolved in 25 mL ethyl acetate and undissolved salts were removed by filtration. After evaporation of the ethyl acetate, the residue was dissolved in methanol and passed over a silica gel column (4.8×13 cm). The product containing fractions were combined, concentrated, and chromatographed on a Chromatotron (4 mm silica gel plate) with a mixture of hexane:acetone (8:2). The product was further purified on the Chromatotron (2 mm silica gel plate) with a mixture of chloroform:acetone (99:1). Lyophilization afforded 0.268 g of 6-(cyclopropylmethylamino)-9-[(2R,5S)-5-[(hexanoyloxy)methyl]-tetrahydro-2-furyl]-9H-purine as an oil (40% yield).

Workup

  1. customThe reaction was quenched with methanol and solvents
  2. customwere evaporated in vacuo
  3. dissolutionThe residue was dissolved in 25 mL ethyl acetate
  4. customundissolved salts were removed by filtration
  5. customAfter evaporation of the ethyl acetate
  6. dissolutionthe residue was dissolved in methanol
  7. additionThe product containing fractions
  8. concentrationconcentrated
  9. customchromatographed on a Chromatotron (4 mm silica gel plate) with a mixture of hexane:acetone (8:2)
  10. customThe product was further purified on the Chromatotron (2 mm silica gel plate) with a mixture of chloroform:acetone (99:1)

Sources & evidence

ORD record
ord-b945042a63ff45dca39a482b9c9bc572
Source dataset
uspto-grants-1991_11
Patent number
US05068320

Reaction notes

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