Synthesis, antioxidant and antimicrobial activity of novel vanillin derived piperidin-4-one oxime esters: Preponderant role of the phenyl ester substituents on the piperidin-4-one oxime core
作者:Salakatte Thammaiah Harini、Honnaiah Vijay Kumar、Javarappa Rangaswamy、Nagaraja Naik
DOI:10.1016/j.bmcl.2012.10.019
日期:2012.12
been achieved the efficient synthesis of vanillin derived piperidin-4-one oxime esters (5a–m) via four step reaction involved Mannich reaction of vanillin, acetone and ammonium acetate to obtain 2,6-bis(4-hydroxy-3-methoxyphenyl)-piperidin-4-one 2 followed by N-methylation and oximation. Further, to enhance the biological activity of vanillin derived piperidin-4-one oxime core, esterification of 4 with
通过四步反应,包括香草醛,丙酮和乙酸铵的曼尼希反应,获得2,6-双(4-羟基-3)的四步反应,从而有效地合成了香兰素衍生的哌啶丁-4-酮肟酯(5a–m)。 -甲氧基苯基)-哌啶-4-酮2,然后进行N-甲基化和肟化。此外,为增强香草醛衍生的哌啶丁-4-酮肟酯的生物活性,在强有机碱t- BuOK存在下,用取代的苯甲酰氯将4酯化可制得一系列香草醛衍生的哌啶丁-4-酮肟酯(5a –m)。筛选了合成的类似物的抗氧化剂和抗菌素研究,并证明了苯基酯取代基对哌啶丁-4-酮肟核心生物活性的显著作用。在测试的化合物中,5i和5j表现为优于标准的丁基化羟基茴香醚(BHA)的抗氧化剂,而化合物5b和5d分别显示出比标准链霉素和氟康唑更强的抗菌和抗真菌活性。