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。
Catalytic Enantioselective Synthesis of 2-Aryl Chromenes and Related Phosphoramidite Ligands and Catalyst Compounds
申请人:Northwestern University
公开号:US20150315168A1
公开(公告)日:2015-11-05
Methods to access 2-aryl chromene compounds via an asymmetric catalytic process.
通过不对称催化过程访问2-芳基色素化合物的方法。
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
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
Amide–imine conjugate involving gallic acid and naphthalene for nano-molar detection, enrichment and cancer cell imaging of La<sup>3+</sup>: studies on the catalytic activity of the La<sup>3+</sup> complex
作者:Ahad Shaikh、Milan Ghosh、Pallabi Mukherjee、Avijit Ghosh、Rostam Ali Molla、Sabyasachi Ta、Debasis Das
DOI:10.1039/d0nj02415e
日期:——
A singlecrystal X-ray structurally characterized amide–imine conjugate (GAN) derived from gallic acid and naphthalene selectively recognizes La3+ ions via TURN ON fluorescence through ESIPT and CHEF mechanisms. GAN can detect as low as 23.93 × 10−9 M La3+ ions and image intracellular La3+ ions in live HeLa and SiHa cells under a fluorescence microscope in a time- and concentration dependent manner
从没食子酸和萘衍生的单晶X射线结构表征的酰胺-亚胺共轭物(GAN)通过ESIPT和CHEF机理通过开启荧光选择性地识别La 3+离子。在荧光显微镜下,GAN可以以时间和浓度依赖的方式检测低至23.93×10 -9 M La 3+离子,并在荧光显微镜下对活HeLa和SiHa细胞中的细胞内La 3+离子成像。建立了相应的[ La(III)–GAN ]配合物,作为从邻位合成苯并咪唑衍生物的有效催化剂-苯二胺和取代的苯甲醛。此外,GAN对于在乙酸乙酯介质中富集La 3+很有用。
Photorelease of a metal-binding pharmacophore from a Ru(<scp>ii</scp>) polypyridine complex
作者:Johannes Karges、Ryjul W. Stokes、Seth M. Cohen
DOI:10.1039/d0dt04290k
日期:——
drawback, drug candidates can be formulated as prodrugs. While a variety of protecting groups have been developed, increasing efforts have been devoted towards the use of caging groups that can be removed upon exposure to light to provide spatial and temporal control over the treatment. Among these, the application of Ru(II) polypyridine complexes is receiving increased attention based on their attractive
基于其有吸引力的生物和光物理特性,采用包含相对低(<5id=61>II)聚吡啶复合物的靶向金属酶的化合物正受到越来越多的关注。在此,提出了一种由金属酶抑制剂和作为光笼的Ru( II )聚吡啶络合物组成的缀合物。该缀合物是使用密度泛函理论计算和对接研究设计的。该缀合物在水溶液中稳定,但用 450 nm 光照射该复合物会在几分钟内释放抑制剂。作为模型系统,针对流感病毒的核酸内切活性位点研究了生化特性。虽然在体外试验中在黑暗中没有显示出抑制作用,但该缀合物在 450 nm 的光照下产生了抑制作用,证明了释放金属酶抑制剂的能力。所提出的抑制剂-Ru( II )聚吡啶缀合物是光激活药物释放的计算引导药物设计的一个例子,可能有助于揭示金属酶抑制剂前药的新途径。