Synthesis, Structure and Properties of Fused π‐Extended Acridone Derivatives
作者:Hongshuai Gao、Gang Zhang
DOI:10.1002/ejoc.202000871
日期:2020.9.7
The angularly and linearly fused acridone derivatives were synthesized and their properties were shape‐depended. The angularly fused acridone derivatives showed weakened aromaticity of the benzene ring at the turning point, whereas the linearly fused ones demonstrated stronger fluorescence intensity and better electronic couplings with potential applications in organic electronics.
A novel and efficient route for the synthesis of new benzo[b]acridones has been described. It involves the Diels-Alder reaction of N-substituted-4-quinolone-3-carbaldehyde with ortho-benzoquinodimethanes giving benzo[b]-1,6,6a,12a-tetrahydroacridones, which are the result of a cycloaddition reaction followed by an in situ deformylation. The oxidation of these tetrahydroacridones in dimethyl sulfoxide using a catalytic amount of iodine gives the new benzo[b]acridone derivatives. It was demonstrated that the cycloaddition reaction is only efficient if an electron-withdrawing N-protecting group is present.
本研究描述了合成新苯并[b]吖啶酮的新颖而高效的路线。该方法涉及 N-取代-4-喹啉酮-3-甲醛与邻苯醌二甲烷的 Diels-Alder 反应,通过环加成反应和原位变形反应生成苯并[b]-1,6,6a,12a-四氢吖啶酮。使用一定量的碘催化这些四氢吖啶酮在二甲基亚砜中的氧化反应,可以得到新的苯并[b]吖啶酮衍生物。实验证明,只有当存在一个电子撤回的 N 保护基团时,环化反应才会有效。
Synthesis of benzo-fused benzodiazepines employed as probes of the agonist pharmacophore of benzodiazepine receptors
作者:Weijiang Zhang、Konrad F. Koehler、Bradford Harris、Phil Skolnick、James M. Cook
DOI:10.1021/jm00032a007
日期:1994.3
in vitro evaluation of benzo-fused benzodiazepines 1-6 are described. These "molecular yardsticks" were employed to probe the spatial dimensions of the lipophilic pocket L2 in the benzodiazepinereceptor (BzR) cleft and to determine the effect of occupation of L2 with respect to agonist activity. Of the new analogs synthesized, the 7,8-benzo-fused benzodiazepine 6 displayed moderately high affinity
Synthesis, characterization and biological evaluation of carboranylmethylbenzo[b]acridones as novel agents for boron neutron capture therapy
作者:A. Filipa F. da Silva、Raquel S. G. R. Seixas、Artur M. S. Silva、Joana Coimbra、Ana C. Fernandes、Joana P. Santos、António Matos、José Rino、Isabel Santos、Fernanda Marques
DOI:10.1039/c4ob00644e
日期:——
Herein we present the synthesis and characterization of benzo[b]acridin-12(7H)-ones bearing carboranyl moieties and test their biological effectiveness as boron neutroncapturetherapy (BNCT) agents in cancer treatment. The cellular uptake of these novel compounds into the U87 human glioblastoma cells was evaluated by boron analysis (ICP-MS) and by fluorescence imaging (confocal microscopy). The compounds
在本文中,我们介绍了带有碳硼烷基部分的苯并[ b ] ac啶酮-12(7 H)-的合成和表征,并测试了其作为硼中子俘获治疗(BNCT)剂在癌症治疗中的生物学有效性。通过硼分析(ICP-MS)和荧光成像(共聚焦显微镜)评估了这些新化合物在U87人胶质母细胞瘤细胞中的细胞摄取。化合物进入U87细胞后表现出相似的特征,即在细胞骨架和细胞膜中的优先积累和低细胞毒性活性(IC 50值高于200μM)。葡萄牙研究堆中子辐照后的细胞毒性和细胞形态变化(6.6×10 7通过MTT测定和电子显微镜(TEM)评估中子cm -2 s -1,1 MW)。中子照射后表明,BNCT对细胞具有更高的细胞毒性作用。用一种化合物处理过的细胞的细胞质中的膜状螺纹的积累与辐射诱导的细胞毒性作用密切相关。结果为将这些化合物之一视为新一代BNCT药物的主要候选药物提供了有力的依据。
Base-Controlled Synthesis of Fluorescent Acridone Derivatives via Formal (4 + 2) Cycloaddition
of acridone derivatives has been developed from simple and easily accessible o-aminobenzamides and 2-(trimethylsilyl)aryl triflates. The base played an important role in the selective controlled synthesis of N-H and N-aryl acridones. A preliminary study on the fluorescence properties of N-aryl acridones demonstrated that they could be used as fluorescent materials with a broad emission range.