2,4,5-Trisubstituted thiazole derivatives: A novel and potent class of non-nucleoside inhibitors of wild type and mutant HIV-1 reverse transcriptase
摘要:
Novel 2,4,5-trisubstituted thiazole derivatives (TSTs) were designed and synthesized as HIV-1 non-nucleoside reverse transcriptase inhibitors (NNRTIs). Among the thirty-eight synthesized target compounds, thirty TSTs showed potent inhibition against HIV-1 replication in wild type HIV-1 at submicromolar concentrations (from 0.046 to 9.59 mu M). Compounds 21, 23 and 24 were also tested on seven NNRTI-resistant HIV-1 strains, and all exhibited inhibitory effects with fold changes in IC50 ranging from 2.6 to 111, which were better than those of nevirapine (15.6-fold-371-fold). Docking simulations of compound 24 revealed a reasonable mechanism for the binding mode, and three-dimensional quantitative structure activity relationship (3-DQSAR) studies on this novel series of TST further elucidated the structure-activity relationship (SAR). The results suggested the great potential of TSTs as a novel class of NNRTIs with antiviral efficacy and a good resistance profile. (C) 2014 Elsevier Masson SAS. All rights reserved.
Selective catalytic synthesis of α-alkylated ketones and β-alkylated secondary alcohols <i>via</i> hydrogen-borrowing
作者:Md. Bakibillah、Sahin Reja、Kaushik Sarkar、Deboshmita Mukherjee、Rajesh Kumar Das
DOI:10.1039/d3nj02295a
日期:——
were shown to be efficient catalysts for α-alkylation of ketones and β-alkylation of secondary alcohols with primary alcohols in the presence of a catalytic amount of the Cp*Ir(III) catalyst and tBuOK in toluene at 110 °C via hydrogen-borrowing and produced substituted ketone products in good to excellent yields. This new C–C bond-formingreaction needs very small amounts of catalyst and base and produces
制备了由吡啶甲酰胺基部分支持的一组三种Ir-( III )配合物。这些络合物被证明是酮的 α-烷基化和仲醇与伯醇的 β-烷基化的有效催化剂,在催化量的 Cp*Ir( III ) 催化剂和t BuOK 的存在下,在甲苯中于 110 °C下通过借氢并以良好至优异的产率生产取代酮产品。这种新的 C-C 键形成反应需要非常少量的催化剂和碱,并且仅产生 H 2 O 作为副产物,使其成为一种有吸引力且环保的方案,可实现酮衍生物的“绿色”合成。
Direct Acylation of Aryl Chlorides with Aldehydes by Palladium−Pyrrolidine Co-catalysis
A palladium catalyst system has been developed that allows for the direct acylation of aryl chlorides with aldehydes. The choice of ligand, as well as the presence of pyrrolidine and molecular sieves is shown to be critical to the catalysis, which appears to proceed via an enamine intermediate. The reaction was successful for a wide range of aryl chlorides and tolerant of functionality on the aldehyde component, giving easy access to alkyl aryl ketones in modest to good yields.
2,4,5-Trisubstituted thiazole derivatives: A novel and potent class of non-nucleoside inhibitors of wild type and mutant HIV-1 reverse transcriptase
Novel 2,4,5-trisubstituted thiazole derivatives (TSTs) were designed and synthesized as HIV-1 non-nucleoside reverse transcriptase inhibitors (NNRTIs). Among the thirty-eight synthesized target compounds, thirty TSTs showed potent inhibition against HIV-1 replication in wild type HIV-1 at submicromolar concentrations (from 0.046 to 9.59 mu M). Compounds 21, 23 and 24 were also tested on seven NNRTI-resistant HIV-1 strains, and all exhibited inhibitory effects with fold changes in IC50 ranging from 2.6 to 111, which were better than those of nevirapine (15.6-fold-371-fold). Docking simulations of compound 24 revealed a reasonable mechanism for the binding mode, and three-dimensional quantitative structure activity relationship (3-DQSAR) studies on this novel series of TST further elucidated the structure-activity relationship (SAR). The results suggested the great potential of TSTs as a novel class of NNRTIs with antiviral efficacy and a good resistance profile. (C) 2014 Elsevier Masson SAS. All rights reserved.
Electrochemical‐Induced Hydrogenation of Electron‐Deficient Internal Olefins and Alkynes with CH
<sub>3</sub>
OH as Hydrogen Donor
作者:Hongyun Qin、Jianjing Yang、Kelu Yan、Yaxuan Xue、Meichen Zhang、Xuejun Sun、Jiangwei Wen、Hua Wang
DOI:10.1002/adsc.202100022
日期:2021.4.13
Efficient hydrogenation of electron‐deficient internal olefins and alkynes access to saturate ketone with CH3OH as a single hydrogen donor under electrochemical conditions has been successfully developed. This hydrogenation strategy can be used to convert electron‐deficient internal olefins and alkynes to saturate ketone under electrochemical conditions with exogenous‐reductant and a metal catalyst