[H-].[Na+].[N:3]1([C:14](=[O:15])[C:13]2[NH:12][CH:11]=[N:10][C:9]=2[N:7]([CH3:8])[C:5]1=[O:6])[CH3:4].Br[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH:26]=[CH2:27].O>CS(C)=O>[CH2:27]([N:12]1[C:13]2[C:14](=[O:15])[N:3]([CH3:4])[C:5](=[O:6])[N:7]([CH3:8])[C:9]=2[N:10]=[CH:11]1)[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22][CH2:21][CH2:20][CH2:19][CH:18]=[CH2:17]This example illustrates a synthesis of 7-(11,10-Oxidondecyl)-1,3-dimethylxanthine (inventive compound no. -1423). Sodium hydride(95%) (0.575 g, 24 mmol) was added to a solution of theophylline (3.6 g, 20 mmol) in dimethylsulfoxide (100 mL). After 20 minutes of stirring, 1-bromoundec-10-ene (4.66 g, 20 mmol) was added and stirred for 12 hours at room temperature. The reaction mixture was then poured into a separatory funnel containing water (300 mL) and extracted with dichloromethane (5×100 mL). The organic extracts were combined, washed with water (100 mL) and brine (100 mL), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The crude product obtained was further purified by flash chromatography over silica gel using 50% hexane/ethyl acetate eluant, yielding 6.26 g (94% yield) of 7-(10-undecenyl)-1,3-dimethylxanthine (inventive compound no. 1420).
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