In view of the powerful antiseptic action of certain anil quinoline compounds (Browning, Cohen, Ellingworth and Gulbransen, 1926) and the trypanocidal action of these and especially of some styryl quinoline derivatives (Browning, Cohen, Ellingworth and Gulbransen, 1929), it was thought desirable to examine the action of similar compounds containing other heterocyclic nuclei. The present communication is concerned with a number of derivatives of benzthiazole, in which the pyridine ring of the quinoline group is replaced by a five-membered ring containing both nitrogen and sulphur.
Antiseptic Action
. Antiseptic power was estimated as in previous communications (Browning, Cohen, Elingworth and Gulbransen, 1926, 1928). Throughout the range of the anil benzthiazole compounds examined the antiseptic activity is considerably lower than that of the corresponding quinoline compounds. The styryl compounds tend also to be weak in their antiseptic action and in this respect resemble the styryl quinoline series, but in general they are not inferior to the latter in potency. Frequently in the present series of compounds the irregularities in action, previously commented upon, were observed in marked degree.