[Cl:1][C:2]1[N:7]=[C:6]2[NH:8][C:9]([C:11]3[S:12][C:13]4[C:19]([N:20]5[CH2:25][CH2:24][O:23][CH2:22][CH2:21]5)=[CH:18][CH:17]=[C:16]([O:26][CH3:27])[C:14]=4[N:15]=3)=[N:10][C:5]2=[CH:4][CH:3]=1.[H-].[Na+].[CH2:30](Cl)[O:31][CH3:32]>CN(C=O)C.[I-].C([N+](CCCC)(CCCC)CCCC)CCC>[Cl:1][C:2]1[N:7]=[C:6]2[N:8]([CH2:30][O:31][CH3:32])[C:9]([C:11]3[S:12][C:13]4[C:19]([N:20]5[CH2:25][CH2:24][O:23][CH2:22][CH2:21]5)=[CH:18][CH:17]=[C:16]([O:26][CH3:27])[C:14]=4[N:15]=3)=[N:10][C:5]2=[CH:4][CH:3]=10.3 g 5-Chloro-2-(4-methoxy-7-morpholin-4-yl-benzothiazol-2-yl)-3H-imidazo[4,5-b]pyridine (0.74 mmol) was dissolved in dry DMF (10.0 ml) and treated with 0.033 g NaH (65% in oil, 0.9 mmol) at 0° C. After stirring at ambient temperature for 1 h, 68 μl MOMCl (0.9 mmol) and 0.011 g tetrabutyl ammonium iodide (0.03 mmol) were added and the reaction mixture was stirred for 16 h. The suspension was filtered and the residue triturated in ether. Upon drying in vacuo, one obtained 0.29 g of 5-chloro-3-methoxymethyl-2-(4-methoxy-7-morpholin-4-yl-benzothiazol-2-yl)-3H-imidazo[4,5-b]pyridine (87%) as a yellow solid; M.p.: 167–170° C.
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