Abstract
AbstractFour substituted [1]benzothieno[2,3‐c]quinolines 14a‐14d were prepared by photocyclization of the appropriate carboxamides 8a‐8d to the corresponding [1]benzothieno[2,3‐c]quinolin‐6(5H)‐ones 12a‐12d followed by chlorination to 6‐chloro[1]benzothieno[2,3‐c]quinolines 13a‐13d and dechlorination resulting in the title compounds. Treatment of 14a‐14d with iodomethane furnished the corresponding N‐methyl quaternary salts 5a‐5d.
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