Propylamine → 3-((tert-butyldimethylsilyl)oxy)propyl-7-(4-chlorobenzyl)-3-methyl-8-(propylamino)-1H-purine-2,6(3H,7H)-dione

HRID 2200737Notes

Reaction equation

HRID 2200737 reaction equation
Br[C:2]1[N:10]([CH2:11][C:12]2[CH:17]=[CH:16][C:15]([Cl:18])=[CH:14][CH:13]=2)[C:9]2[C:8](=[O:19])[N:7]([CH2:20][CH2:21][CH2:22][O:23][Si:24]([C:27]([CH3:30])([CH3:29])[CH3:28])([CH3:26])[CH3:25])[C:6](=[O:31])[N:5]([CH3:32])[C:4]=2[N:3]=1.[CH2:33]([NH2:36])[CH2:34][CH3:35]>C(O)C.O>[Si:24]([O:23][CH2:22][CH2:21][CH2:20][N:7]1[C:8](=[O:19])[C:9]2[N:10]([CH2:11][C:12]3[CH:13]=[CH:14][C:15]([Cl:18])=[CH:16][CH:17]=3)[C:2]([NH:36][CH2:33][CH2:34][CH3:35])=[N:3][C:4]=2[N:5]([CH3:32])[C:6]1=[O:31])([C:27]([CH3:29])([CH3:28])[CH3:30])([CH3:25])[CH3:26]

Participants

5

Reactant 2

HCID 7852PropylamineHCID 904028568-bromo-1-(3-((tert-butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione2×

Product 1

HCID 1317357113-((tert-butyldimethylsilyl)oxy)propyl-7-(4-chlorobenzyl)-3-methyl-8-(propylamino)-1H-purine-2,6(3H,7H)-dioneYield 63%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

Step 1 8-Bromo-1-(3-((tert-butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-3-methyl-1H-purine-2,6(3H,7H)-dione (0.25 g, 0.46 mmol, intermediate 77) and propan-1-amine (1.44 mL, 9.2 mmol) were combined in ethanol (5 mL) and heated at reflux for 24 h. The reaction was cooled to room temperature, diluted with water (75 mL) and extracted with ethyl acetate (3×75 mL). The combined organic extracts were dried with magnesium sulfate, filtered and the solvent evaporated under reduced pressure to yield a light golden oil. The oil was purified using a 25 g silica gel column eluted with 20% ethyl acetate/hexanes to give 1-(3-((tert-butyldimethylsilyl)oxy)propyl-7-(4-chlorobenzyl)-3-methyl-8-(propylamino)-1H-purine-2,6(3H,7H)-dione (0.15 g, 63% yield) as a white solid. LCMS retention time=5.013 min and 97% purity, LCMS MH+ 520.

Workup

  1. temperatureheated
  2. temperatureat reflux for 24 h
  3. extractionextracted with ethyl acetate (3×75 mL)
  4. dry with materialThe combined organic extracts were dried with magnesium sulfate
  5. filtrationfiltered
  6. customthe solvent evaporated under reduced pressure
  7. customto yield a light golden oil
  8. customThe oil was purified
  9. washeluted with 20% ethyl acetate/hexanes

Sources & evidence

ORD record
ord-fcdffd6913f64a65bb4b0dc696e1f6e2
Source dataset
uspto-grants-2016_06
Patent number
US09359359B2

Reaction notes

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