Four substituted [1]benzothietto[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-c:hloro[1]benzothieno[2,3-c]quittolines 13a-13d and dechlorination resulting in the title compounds. Treatment of 14a-14d with iodomethane furnished the corresponding N-methyl quaternary salts 5a-5d.