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

HRID 2200741Notes

Reaction equation

HRID 2200741 reaction equation
[CH:1]1([OH:6])[CH2:5][CH2:4][CH2:3][CH2:2]1.[H-].[Na+].Br[C:10]1[N:18]([CH2:19][C:20]2[CH:25]=[CH:24][C:23]([Cl:26])=[CH:22][CH:21]=2)[C:17]2[C:16](=[O:27])[N:15]([CH2:28][CH2:29][CH2:30][O:31][Si:32]([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33])[C:14](=[O:39])[N:13]([CH3:40])[C:12]=2[N:11]=1>C1COCC1.O>[Si:32]([O:31][CH2:30][CH2:29][CH2:28][N:15]1[C:16](=[O:27])[C:17]2[N:18]([CH2:19][C:20]3[CH:21]=[CH:22][C:23]([Cl:26])=[CH:24][CH:25]=3)[C:10]([O:6][CH:1]3[CH2:5][CH2:4][CH2:3][CH2:2]3)=[N:11][C:12]=2[N:13]([CH3:40])[C:14]1=[O:39])([C:35]([CH3:36])([CH3:37])[CH3:38])([CH3:33])[CH3:34]

Participants

6

Reactant 3

HCID 7298CyclopentanolHCID 24758Sodium hydrideHCID 904028568-bromo-1-(3-((tert-butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione2×

Product 1

HCID 904026851-(3-((tert-butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-8-(cyclopentyloxy)-3-methyl-1H-purine-2,6(3H,7H)-dioneYield 100%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

Step 1 Cyclopentanol (0.21 mL, 2.31 mmol) was dissolved in THF (5 mL) and sodium hydride (60% in oil, 0.092 g, 2.31 mmol) was added. The reaction was stirred for 1 h. 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) was added and the reaction was stirred at room temperature for 15 h. The reaction was diluted with water (100 mL) and extracted with ethyl acetate (3×75 mL). The combined extracts were dried with magnesium sulfate, filtered and the solvent was removed under reduced pressure to give 1-(3-((tert-butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-8-(cyclopentyloxy)-3-methyl-1H-purine-2,6(3H,7H)-dione (0.25 g, 100% yield) as a golden oil. LCMS retention time=5.843 min and 71% purity, LCMS MH+ 547.

Workup

  1. stirringthe reaction was stirred at room temperature for 15 h
  2. extractionextracted with ethyl acetate (3×75 mL)
  3. dry with materialThe combined extracts were dried with magnesium sulfate
  4. filtrationfiltered
  5. customthe solvent was removed under reduced pressure

Sources & evidence

ORD record
ord-166b2c829d7945f4a2db33bf11edee50
Source dataset
uspto-grants-2016_06
Patent number
US09359359B2

Reaction notes

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