functionalization in one pot to obtain a library of compounds for anticancer activity. Among the investigated compounds, 2c (SVM-2), 4c (SVM-4) and 2d (SVM-9) show IC50 values of 5.18, 4.89 and 27.3 μM respectively in HeLa S3 cancer cells. Compound 5c (SVM-5) shows IC50 values of 13.3 and 14.2 μM in A549 and HeLa S3 cancer cells, respectively. Compounds 2c (SVM-2) and 4c (SVM-4) produce morphological changes
N-Heterocyclic Carbene-Catalyzed Intramolecular Aldehyde−Nitrile Cross Coupling: An Easy Access to 3- Aminochromones
作者:Seenuvasan Vedachalam、Jing Zeng、Bala Kishan Gorityala、Meraldo Antonio、Xue-Wei Liu
DOI:10.1021/ol9026232
日期:2010.1.15
An immense effort has been made to develop an efficient strategy for the carbon-carbon bond formation between aldehyde and nitrile intramolecularly using an N-heterocyclic carbene catalyst to derive 3-aminochromone derivatives in good to excellent yields (80-95%).
Connor, David T.; Young, Patricia A.; Strandtmann, Maximilian von, Journal of Heterocyclic Chemistry, 1981, vol. 18, p. 697 - 702
作者:Connor, David T.、Young, Patricia A.、Strandtmann, Maximilian von
DOI:——
日期:——
Rh-Catalyzed Sequential Asymmetric Hydrogenations of 3-Amino-4-Chromones Via an Unusual Dynamic Kinetic Resolution Process
first time via an unprecedented dynamickineticresolution under neutral conditions, providing (S,R)-3-amino-4-chromanols in high yields (up to 98%) with excellent enantio- and diastereoselectivities (up to 99.9% ee and 20:1 dr). The mechanistic studies based on control experiments and density functional theory (DFT) calculations suggest that the dynamickineticresolution process for the intermediate
Rh 催化的 3-amino-4-chromones 连续不对称氢化已首次通过中性条件下前所未有的动态动力学分辨率实现,提供 ( S , R)-3-amino-4-chromanols,产率高(高达 98%),具有出色的对映和非对映选择性(高达 99.9% ee 和 20:1 dr)。基于控制实验和密度泛函理论 (DFT) 计算的机理研究表明,在第一个氢化步骤中生成的中间体对映体的动态动力学拆分过程是通过从不需要的对映体到所需的立体突变(或称为手性同化)途径进行的对映异构体,而不是通过不需要的对映异构体的传统外消旋化。该协议可以在克规模上以相对较低的催化剂负载进行,并为合成一系列具有生物活性的苯二酚及其衍生物提供了一种实用且方便的途径。