1-Methylpiperazine → 4-(4-Methylpiperazin-1-yl)-6-(4-hydroxyphenyl)thieno[3,2-c]pyridine

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Reaction Steps

4-(4-Methylpiperazin-1-yl)-6-(4-hydroxyphenyl)thieno[3,2-c]pyridine (413 mg) obtained from 4-chloro-6-(4-methoxyphenyl)thieno[3,2-c]pyridine and N-methylpiperazine in the same manner as in Example 289-6 was dissolved in DMF (10 ml), followed by the addition of potassium carbonate (526 mg) and 2-bromoethanol (0.18 ml). The resulting mixture was stirred at 80° C. for 2 days, and then the resulting reaction mixture was partitioned between ethyl acetate and water. The resulting organic layer was washed with water, dried and evaporated. The resulting residue was purified by NH-silica gel column chromatography (hexane/ethyl acetate system), to give a yellow oil (202 mg, yield; 43%). The resulting oil was converted into a hydrochloride in a conventional manner, to give the title compound as yellow crystals.

Provenance & Evidence