Applications of 2-arylhydrazononitriles in synthesis: Preparation of new indole containing 1,2,3-triazole, pyrazole and pyrazolo[1,5-a]pyrimidine derivatives and evaluation of their antimicrobial activities
作者:Haider Behbehani、Hamada Mohamed Ibrahim、Saad Makhseed、Huda Mahmoud
DOI:10.1016/j.ejmech.2011.02.040
日期:2011.5
reactions with enaminones 15 afford 17. Finally, compound 5 reacts with cinnamaldehyde to yield the corresponding Schiff’s base 18 that does not undergo cyclization to form the pyridine derivative 19. The activities of all new substances synthesized in this investigation were evaluated against a panel of microbial organisms. The results show that 4a, 4b, 5b and 9b display strong antimicrobial activities
在这一努力中,将2-芳基二氮杂腈用作制备多种新的,独特取代的杂环物质的关键合成子。另外,生物学评估的结果表明,所制备的组的成员具有对革兰氏阴性细菌,革兰氏阳性细菌和酵母的有希望的抗菌活性。在合成序列中,发现3-(1-甲基-1 H-吲哚-3-基)-3-氧代-2-(苯基肼基)丙腈2a及其2-甲基衍生物2b与盐酸羟胺反应生成相应的吲哚基-5-氨基-2-苯基-1,2,3-三唑4a,b。这些胺在乙酸酐存在下在热或微波辐射条件下与氰基乙酸发生反应,生成相应的氰基乙酰胺5a,b,该氰基乙酰胺5a,b容易与二甲基甲酰胺二甲基乙缩醛缩合,生成烯腈6a,b。与水合肼一起加热6a,b可得到化合物8,而当这些反应物进行微波辐射时会生成化合物12。我们观察到,氨基吡唑9种发生反应与enaminal 13,得到14层,并且其与烯胺酮的反应15买得起17。最后,化合物5与肉桂醛反应以产生相应的席夫氏碱18,该碱未进行环