Novel 2,6-bis(4-methoxyphenyl)-1-methylpiperidin-4-one oxime esters: synthesis and a new insight into their antioxidant and antimicrobial potential
作者:Salakatte Thammaiah Harini、Honnaiah Vijay Kumar、Sannenahalli Krishnegowda Peethambar、Javarappa Rangaswamy、Nagaraja Naik
DOI:10.1007/s00044-013-0793-z
日期:2014.4
explore the enhanced biological properties of the piperidin-4-one core i.e. the key scaffold 4 was conjugated with substituted benzoyl chlorides in the presence of anhydrous K2CO3 as base to obtain novel 2,6-bis(4-methoxyphenyl)-1-methylpiperidin-4-one oxime esters 4(a–q) in excellent yields. The newly synthesized compounds were characterized by elemental analysis, IR, 1H NMR, 13C NMR and mass spectroscopic
描述了一种合成新型2,6-双(4-甲氧基苯基)-1-甲基哌啶-4-酮肟酯4(aq)的简单有效的方法。最初,将对茴香醛1与丙酮和乙酸铵三水合物缩合(曼尼希反应),得到2,6-双(4-甲氧基苯基)哌啶-4-酮2。然后,进行甲基化,然后用盐酸羟胺(NH 2 OH·HCl)进行肟化,制得了关键的支架4。此外,为了研究哌啶-4-酮核心的增强的生物学特性,即在无水K 2 CO 3存在下将关键支架4与取代的苯甲酰氯共轭。作为基础以优异的收率获得新型的2,6-双(4-甲氧基苯基)-1-甲基哌啶-4-酮肟酯4(aq)。通过元素分析,IR,1 H NMR,13 C NMR和质谱技术对新合成的化合物进行表征,并筛选它们的体外抗氧化和抗菌活性。大多数化合物对所进行的生物学测定均具有积极的功效。在合成的类似物中,化合物4l和4m显示出有希望的抗氧化活性,另一方面,化合物4b和4d显示出有说服力的抗菌活性,而化合物4b对黄曲霉菌株显示出惊人的抗真菌活性。