[C:1]1([NH:7][CH2:8][CH2:9][O:10][CH2:11][CH2:12][CH2:13][S:14][C:15]2[N:20]3[CH:21]=[CH:22][N:23]=[C:19]3[CH:18]=[CH:17][CH:16]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(N(CC)CC)C.[CH3:31][S:32](Cl)(=[O:34])=[O:33]>C(Cl)Cl>[CH3:31][S:32]([N:7]([CH2:8][CH2:9][O:10][CH2:11][CH2:12][CH2:13][S:14][C:15]1[N:20]2[CH:21]=[CH:22][N:23]=[C:19]2[CH:18]=[CH:17][CH:16]=1)[C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)(=[O:34])=[O:33]To a solution of 5-[3-[2-(phenylamino)ethyloxy]propylthio]imidazo[1,2-a]pyridine (1.034 g, 3.158 mmoles) and triethylamine (0.88 ml, 6.3 mmoles) in methylene chloride (30 ml) was added methanesulfonyl chloride (0.37 ml, 4.7 mmoles) with stirring under ice-cooling and the mixture was further stirred under ice-cooling for 10 minutes. The reaction mixture was washed with water and the aqueous layer was extracted with methylene chloride (30 ml×3). The methylene chloride layers were combined and dried over anhydrous magnesium sulfate. After the solvent was distilled off, the residue was purified by column chromatography (eluent: ethyl acetate) to obtain 16 mg of the desired product (brown oily product)
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