Studies on Pyrazine Derivatives, XLIV: Synthesis and Tuberculostatic Activity of 4-Substituted 3,4,5,6-Tetrahydro-2H-[1,2′]-Bis-Pyrazine Derivatives
作者:Henryk Foks、Danuta Pancechowska-Ksepko、Mieczyslaw Janowiec、Zofia Zwolska、Ewa Augustynowicz-Kopec
DOI:10.1080/104265090930137
日期:2005.11.1
2-chloro-3-cyanopyrazine was a substrate in the syntheses of some potentially tuberculostatic pyrazine derivatives. This compound, upon action of secondary amines, pyrazine derivatives 1-phenyl-, 1-piperonyl-, 1-(4-fluorophenyl)-, 1-(2-pyridil)-, and 1-benzylpiperazine, gave the corresponding nitriles ( 1a–e ). Compounds 1c , d , e were changed into the amidoximes ( 2c , d , e ) by hydroxylamine action
2-氯-3-氰基吡嗪是合成一些具有潜在抗结核作用的吡嗪衍生物的底物。该化合物在仲胺、吡嗪衍生物 1-苯基-、1-哌啶基-、1-(4-氟苯基)-、1-(2-吡啶基)-和 1-苄基哌嗪的作用下,得到相应的腈 (1a -e)。化合物1c、d、e通过羟胺作用转化为偕胺肟(2c、d、e)。当用多硫化铵处理时,衍生物 1a-e 被转化为相应的硫代酰胺(3a-e)。其中两个硫代酰胺,3a 和 3b,在与乙二胺的环化反应中得到咪唑啉(4a,b)和苯甲酰溴——噻唑衍生物(5a,b)。获得的化合物在体外测试了它们的抗结核活性。化合物5b的抑结核活性最高:MIC 3.1-7。