A series of thiosemicarbazones was obtained by condensation of halogenated N-(diethylaminothiocarbonyl)benzimidoyl chlorides (3b–3h) with 4,4-dimethyl-3-thiosemicarbazide. The activity of the halogenated compounds against the parasite Trypanosoma cruzi was evaluated and compared to the previously reported activity of the corresponding non-substituted thiosemicarbazone. It was found that the halogen-substitution enhances in most cases the anti-parasitic activity. The meta-fluorinated compound (4g) was identified as the most potent one (IC₅₀= 9.0 μM, CC₅₀ > 200 μM), having a selectivity index (SI = IC₅₀/CC₅₀), which is 4-times higher than that of the non-substituted compound. Slight modification of the reaction conditions employed for the synthesis of some of the benzoylthioureas 3a–3g led to the unexpected formation of novel halogenated 6-amino-1,3,5-thiadiazine-2-thiones.

通过将卤化的N-（二乙基氨基硫代羰基）苯甲酰氯（3b–3h）与4,4-二甲基-3-硫代氨基脲缩合，可获得一系列的硫代氨基脲。评估了卤代化合物对寄生虫克氏锥虫的活性，并将其与先前报道的相应的未取代的硫代半脲的活性进行了比较。发现在大多数情况下卤素取代增强了抗寄生虫活性。所述元-fluorinated化合物（4克）被确定为最有效的一个（IC ₅₀ = 9.0μM，CC ₅₀ > 200μM），具有选择性指数（SI = IC ₅₀ / CC ₅₀），比未取代的化合物高4倍。合成某些苯甲酰硫脲3a-3g所用反应条件的轻微改变导致意外形成了新型卤代6-氨基-1,3,5-噻二嗪-2-硫酮。