5-Alkyl-2-(alkylthio)-6-(2,6-dihalophenylmethyl)-3,4-dihydropyrimidin-4(3H)-ones: Novel Potent and Selective Dihydro-alkoxy-benzyl-oxopyrimidine Derivatives
摘要:
Molecular modeling analysis of compounds belonging to the recently published series of dihydroalkoxy-benzyl-oxopyrimidines (DABOs), such as S-DABOs and DATNOs, gave support to the design of new 2,6-disubstituted benzyl-DABO derivatives as highly potent and specific inhibitors of the HIV-1 reverse transcriptase (RT). To follow up on the novel DABO derivatives, we decided to investigate the effect of electron-withdrawing substituents in the benzyl unit of the S-DABO skeleton versus their anti-HIV-1 activity. Such chemical modifications impacted the inhibitory activity, especially when two halogen units were introduced at positions 2 and 6 in the phenyl portion of the benzyl group bound to C-6 of the pyrimidine ring. Various 5-alkyl-2-(alkyl(or cycloalkyl)thio)-6-(2,B-dichloro(or 2, 6-difluoro)phenylmethyl)-3,4-dihydropyrimidin-4(3H)-ones were then synthesized and tested as anti-HIV-1 agents in both cell-based and enzyme (recombinant reverse transcriptase, rRT) assays. Among the various mono- and disubstituted phenyl derivatives, the most potent were those containing a 6-(2,6-difluorophenylmethyl) substituent (F-DABOs), which showed EC50's ranging between 40 and 90 nM and selectivity indexes up to greater than or equal to 5000. An excellent correlation was found between EC50 and IC50 values which confirmed that these compounds act as inhibitors of the HIV-1 RT. The structure-activity relationships of the newly synthesized pyrimidinones are presented herein.
Exploiting the Imidazolium Effect in Base-free Ammonium Enolate Generation: Synthetic and Mechanistic Studies
作者:Claire M. Young、Daniel G. Stark、Thomas H. West、James E. Taylor、Andrew D. Smith
DOI:10.1002/anie.201608046
日期:2016.11.7
function as ammonium enolate precursors in the absence of base. Enantioselective Michael addition–cyclization reactions using different α,β‐unsaturated Michael acceptors have been performed to form dihydropyranones and dihydropyridinones with high stereoselectivity. Detailed mechanistic studies using RPKA have revealed the importance of the “imidazolium” effect in ammonium enolateformation and have highlighted
using a highly efficient, eco-friendly protocol via a copper(I)-catalyzed click reaction between various substituted arylazides and terminal alkynes. The synthetic route was easy to access and gave excellent yields under microwave irradiation conditions compared to the conventional heating route. The structures of all the compounds were characterized by IR, 1H NMR, 13C NMR spectroscopy and mass spectrometry
采用高效、环保的方案,通过各种取代芳基叠氮化物和末端炔烃之间的铜()催化点击反应,合成了基于香豆素的 1,4-二取代 1,2,3-三唑衍生物。与传统的加热路线相比,该合成路线易于实现,并且在微波辐射条件下具有优异的产率。所有化合物的结构均通过IR、 1 H NMR、 13 C NMR 谱和质谱进行了表征。对所有合成的化合物进行体外抗菌、抗氧化和抗炎活性筛选;在所有化合物中, 8a 、 8j 、 8k和8l相对于标准药物表现出更好的结果。此外,还使用 Schrödinger 套件的 Glide 模块对 PDB ID 2VCX(抗炎)、3VXI(抗氧化剂)、4GEE(抗菌)和 2XFH(抗真菌)进行了分子对接研究。最终化合物8d 、 8e 、 8h和8k显示出与所有蛋白质中的 His-88 和 Val-191 蛋白质以及与水的最高氢键相互作用。
Microwave assisted synthesis of
<scp>4‐methyl</scp>
‐3‐arylpyrano[2,3‐f]chromen‐2(
<scp>8H</scp>
)‐one derivatives, evaluation of antiproliferative, and antimicrobial activities
series of new 4‐methyl‐3‐arylpyrano[2,3‐f]chromen‐2(8H)‐one derivatives were designed and synthesized through an efficient, an eco‐friendly manner under microwave irradiation and conventional heating methods. Structures of final compounds established based on IR, NMR and mass spectral analysis. The final target compounds were screened for their in vitro antiproliferative activity by taking cisplatin as
N → N’ acyl migration in the context of a medicinal chemistry program
作者:Dennis Anderson、Guoyun Bai、Shawn Cabral、David W. Piotrowski、Liuqing Wei
DOI:10.1016/j.tet.2022.132950
日期:2022.9
A series of tertiary amides was identified as lead matter for a new medicinal chemistry program. Analysis of analogs made for structure activity studies and physicochemical property measurements revealed that some of these tertiary amides were prone to acylmigration. A series of compounds designed to assess the propensity for acylmigration was synthesized. Qualitative time and temperature kinetics
一系列叔酰胺被确定为新药物化学计划的铅物质。对用于结构活性研究和物理化学性质测量的类似物的分析表明,这些叔酰胺中的一些易于发生酰基迁移。合成了一系列旨在评估酰基迁移倾向的化合物。使用1 H NMR 技术对定性时间和温度动力学进行定量动力学测量。该系列中的许多经过检查的叔酰胺显示在 pH 值和温度范围内迁移。我们的发现为其他使用类似性质的酰胺的人提供了警示。
New Tetracyclic Derivatives of Imidazo[1,5-a][1,4]benzodiazepines and of Imidazo[1,5-a]-thieno[3,2-f][1,4]-diazepines
The synthesis of new tetracyclic 1,4-diazepine derivatives is described. In these compounds, an additional five-membered heterocycle is fused on the known tricyclic ring systems imidazo[1,5-a][1,4]benzodiazepine and imidazo[1,5-a]thieno[3,2-f][1,4]diazepine. Many of these new compounds display a very high affinity to the benzodiazepine receptor in mammals.