Water → 8-(1-Benzyl-1H-pyrazol-4-yl)-2-chloro-1-propyl-7-(2-trimethylsilanyl-ethoxymethyl)-1,7-dihydro-purin-6-one

HRID 925532Notes

Reaction equation

[CH2:1]([N:8]1[CH:12]=[C:11]([C:13]2[NH:21][C:20]3[C:19](=[O:22])[N:18]([CH2:23][CH2:24][CH3:25])[C:17]([Cl:26])=[N:16][C:15]=3[N:14]=2)[CH:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].[CH3:33][Si:34]([CH2:37][CH2:38][O:39][CH2:40]Cl)([CH3:36])[CH3:35].O>CN(C=O)C>[CH2:1]([N:8]1[CH:12]=[C:11]([C:13]2[N:21]([CH2:40][O:39][CH2:38][CH2:37][Si:34]([CH3:36])([CH3:35])[CH3:33])[C:20]3[C:19](=[O:22])[N:18]([CH2:23][CH2:24][CH3:25])[C:17]([Cl:26])=[N:16][C:15]=3[N:14]=2)[CH:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A mixture of 8-(1-benzyl-1H-pyrazol-4-yl)-2-chloro-1-propyl-1,7-dihydro-purin-6-one (0.9 g, 2.44 mmol), K2CO3 (1.01 g, 7.32 mmol) in DMF (10 ml) were cooled to 0° C. and added SEM-Cl (1.3 ml, 7.32 mmol). The reaction mixture was stirred at 25° C. for 20 hours. To this reaction mixture water (100 ml) was added and extracted with ethyl acetate (3×30 ml). The combined organic layer was washed with brine (30 ml) and dried over Na2SO4. The organic layer was evaporated to dryness and the crude product was purified by column chromatography using silica gel (100-200 mesh) and 10-15% ethyl acetate in hexane as an eluent to obtain 8-(1-Benzyl-1H-pyrazol-4-yl)-2-chloro-1-propyl-7-(2-trimethylsilanyl-ethoxymethyl)-1,7-dihydro-purin-6-one (0.3 g, 25%) as a off white solid.

Workup

extractionextracted with ethyl acetate (3×30 ml)
washThe combined organic layer was washed with brine (30 ml)
dry with materialdried over Na2SO4
customThe organic layer was evaporated to dryness
customthe crude product was purified by column chromatography

Sources & evidence

ORD record: ord-27cff14d249f4ed78f3bf3721673b835
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09284316B2

Reaction notes

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