Sodium Sulfide → HCID 178468220, compound

HRID 1814943Notes

Reaction equation

[C:1]([O:4][C@H:5]([CH3:27])[CH2:6][CH2:7][CH2:8][CH2:9][N:10]1[C:19](=[O:20])[C:18]2[N:17]([CH2:21][O:22][CH2:23][CH3:24])[C:16](Br)=[N:15][C:14]=2[N:13]([CH3:26])[C:11]1=[O:12])(=[O:3])[CH3:2].[S-2:28].[Na+].[Na+]>C(O)C>[C:1]([O:4][C@H:5]([CH3:27])[CH2:6][CH2:7][CH2:8][CH2:9][N:10]1[C:19](=[O:20])[C:18]2[N:17]([CH2:21][O:22][CH2:23][CH3:24])[C:16]([SH:28])=[N:15][C:14]=2[N:13]([CH3:26])[C:11]1=[O:12])(=[O:3])[CH3:2]

Participants

Conditions

Temperature: 90 °C

Procedure

To a stirring solution of (R)-1-(5-acetoxyhexyl)-8-bromo-7-ethoxymethyl-3-methylxanthine (prepared as described above for CT12440) (1.77 g, 4.0 mmol) in ethanol (100 ml) was added sodium sulfide (4.48 g, 80 mmol). The reaction mixture was stirred at 90° C. for 1 hour. After evaporation of the solvent under reduced pressure, the crude product was purified by flash chromatography on silica gel eluting with ethyl acetate-methanol (7:1) to provide (R)-1-(5-acetoxyhexyl)-7-ethoxymethyl-8-mercapto-3-methylxanthine. This product was dissolved in methanol (100 ml). A solution of hydrogen chloride in ether (1.0 M, 1 .0 ml) was added and stirred at room temperature for 24 hours. After evaporation of the solvent under reduced pressure. The crude product was purified by flash chromatography on silica gel eluting with ethyl acetate-methanol (4:1) to provide (R)-1-(5-hydroxyhexyl)-7-ethoxymethyl-8-mercapto-3-methylxanthine (610 mg, 51% yield) as a white solid.

Workup

customAfter evaporation of the solvent under reduced pressure
customthe crude product was purified by flash chromatography on silica gel eluting with ethyl acetate-methanol (7:1)

Sources & evidence

ORD record: ord-c13280a0ac7e4c89bcf8ea33a4ecfe28
Source dataset: uspto-grants-2005_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06878715B1

Reaction notes

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