Chlorination of 2-, 3-, or 4~ 2tll< ylll1i0qlllIl0li\ l0S (or-pyridincs) with i\'~ chlorosnocinimidc or sulfuryl chloride aflbrds 2-. 3-, or 4-(I-hloro: ilkylthio)—quinolincs (or-pyriclincs), respectively, which in the also of ethyl or propyl compounds can be dchydrochlorinated to 1- alkcnylthioderivatives-'t-('hloro-3~(1~ chloroitlkylthin)-quinolines react with tltiourca to give 2- alkyl-l, 3~ ditl1iolo [4, 5-c] quinolincs.
