Acetaldehyde → 3-Cyclopropylmethyl-8-[4-(ethyl-amino)-benzyl]-1-(2-fluorobenzyl)-3,7-dihydro-purine-2,6-dione

HRID 720688Notes

Reaction equation

HRID 720688 reaction equation
[CH:1]1([CH2:4][N:5]2[C:13]3[N:12]=[C:11]([CH2:14][C:15]4[CH:20]=[CH:19][C:18]([NH2:21])=[CH:17][CH:16]=4)[NH:10][C:9]=3[C:8](=[O:22])[N:7]([CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[F:30])[C:6]2=[O:31])[CH2:3][CH2:2]1.[CH:32](=O)[CH3:33]>[Pd].O1CCCC1>[CH:1]1([CH2:4][N:5]2[C:13]3[N:12]=[C:11]([CH2:14][C:15]4[CH:16]=[CH:17][C:18]([NH:21][CH2:32][CH3:33])=[CH:19][CH:20]=4)[NH:10][C:9]=3[C:8](=[O:22])[N:7]([CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[F:30])[C:6]2=[O:31])[CH2:3][CH2:2]1

Participants

5

Reactant 2

HCID 177AcetaldehydeHCID 218917373-Cyclopropylmethyl-8-[4-aminobenzyl]-1-(2-fluorobenzyl)-3,7-dihydro-purine-2,6-dione

Product 1

HCID 218918193-Cyclopropylmethyl-8-[4-(ethyl-amino)-benzyl]-1-(2-fluorobenzyl)-3,7-dihydro-purine-2,6-dioneYield 62.6%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 8028TetrahydrofuranSolvent

Procedure

To a suspension of 10% palladium on carbon (0.10 g) in tetrahydrofuran (50 mL) was added 3-cyclopropylmethyl-8-[4-aminobenzyl]-1-(2-fluorobenzyl)-3,7-dihydro-purine-2,6-dione (prepared as described in example 64, step 1) (0.21 g, 0.50 mmol) and acetaldehyde (72.6 μL, 1.3 mmol). The mixture was shaken under an atmosphere of hydrogen at 1 atmosphere pressure and ambient temperature for 3 days. The catalyst was removed by filtration through celite, washing the filter pad through with tetrahydrofuran and methanol. The combined filtrate was concentrated in vacuo and the residue purified by chromatography using silica eluted with 1:1 hexanes/ethyl acetate. Concentration of the appropriate fractions gave the product as a colorless solid (0.14 g, 62%). MS, m/z(M+H)=553.

Workup

  1. customThe catalyst was removed by filtration through celite
  2. washwashing the filter pad through with tetrahydrofuran and methanol
  3. concentrationThe combined filtrate was concentrated in vacuo
  4. customthe residue purified by chromatography
  5. washeluted with 1:1 hexanes/ethyl acetate

Sources & evidence

ORD record
ord-d7b4319582c34293b3c5c8e64c59603d
Source dataset
uspto-grants-2006_11
Patent number
US07135475B2

Reaction notes

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