Abstract A series of 3,6-disubstituted-(7H)-s-triazolo[3,4-b][l,3,4]- thiadiazine derivatives were prepared. The compounds were designed to obtain structural similarities and/or bear isosteric relation with certain fused systems encountered in some well-known antiparasitic drugs. The substituents in all products were selected according to the Topliss scheme. Preliminary screening for antiparasitic
摘要制备了一系列3,6-二取代-(7H)-s-三唑并[3,4-b] [1,3,4]-噻二嗪衍
生物。设计这些化合物以获得与某些众所周知的抗寄生虫药物中遇到的某些融合系统的结构相似性和/或具有等位关系。根据Topliss方案选择所有产物中的取代基。使用A虫(Ascaris vitulorum)初步筛选抗寄生虫活性表明,6取代的衍
生物通常比3取代的衍
生物更具活性,并且π效应比σ效应更为明显。