急性肺损伤(ALI)是一种炎症介导的呼吸道疾病,死亡率很高。I 期和 II 期临床试验已证明含有抗炎小分子的药物可显着降低 ALI 死亡率。在这项研究中,设计、合成了两个系列的兰硫酰胺类似物,并评估了其治疗 ALI 的抗炎活性。我们发现化合物8n通过抑制LPS诱导的Raw264.7细胞中促炎细胞因子白细胞介素6(IL-6)和白细胞介素1β(IL-1β)的表达并激活Nrf2/HO表现出最佳的抗炎活性。 -1途径。此外,我们在LPS诱导的ALI小鼠模型中发现,化合物8n显着减少炎症细胞向肺组织的浸润,从而达到保护肺组织和改善ALI的效果。此外,我们的小鼠模型研究表明,化合物8n具有良好的祛痰作用。这些结果一致支持兰硫酰胺类似物8n代表了一类新型抗炎药,有潜力作为先导化合物进一步开发为治疗 ALI 的治疗药物。
急性肺损伤(ALI)是一种炎症介导的呼吸道疾病,死亡率很高。I 期和 II 期临床试验已证明含有抗炎小分子的药物可显着降低 ALI 死亡率。在这项研究中,设计、合成了两个系列的兰硫酰胺类似物,并评估了其治疗 ALI 的抗炎活性。我们发现化合物8n通过抑制LPS诱导的Raw264.7细胞中促炎细胞因子白细胞介素6(IL-6)和白细胞介素1β(IL-1β)的表达并激活Nrf2/HO表现出最佳的抗炎活性。 -1途径。此外,我们在LPS诱导的ALI小鼠模型中发现,化合物8n显着减少炎症细胞向肺组织的浸润,从而达到保护肺组织和改善ALI的效果。此外,我们的小鼠模型研究表明,化合物8n具有良好的祛痰作用。这些结果一致支持兰硫酰胺类似物8n代表了一类新型抗炎药,有潜力作为先导化合物进一步开发为治疗 ALI 的治疗药物。
Cyclic Vinyl(aryl)iodonium Salts: Synthesis and Reactivity
作者:Konrad Kepski、Craig R. Rice、Wesley J. Moran
DOI:10.1021/acs.orglett.9b02540
日期:2019.9.6
A convenient, highly regioselective synthesis of five-membered cyclic vinyl(aryl)iodoniumsalts directly from β-iodostyrenes is presented. An X-ray crystal structure confirms the identity of these heterocycles. These λ3-iodanes can be converted rapidly into functionalized arylacetylenes by treatment with mild base or undergo SNV reactions with nonbasic nucleophiles.
A Ni-catalyzed enantioselective reductive three-component alkylalkenylation of β,γ-alkenyl ketones with cis-alkenyl iodides and fluoroalkyl iodides in the presence of Mn is reported. By leveraging five-membered nickellacycles stabilized by pendant ketone group and chiral bis(oxazoline) (BiOx) ligand, this three-component protocol allows efficient access to enantioenriched β-alkenyl ketones from simple
A procedure for oxidative halo-decarboxylation of alpha,beta-unsaturated carboxylic acids using iodosylbenzene, or iodosylbenzene diacetate, and N-chloro-, N-bromo-, or N-iodosuccinimide is presented. Good yields of the corresponding bromoalkenes are obtained when the alpha,beta-unsaturated carboxylic acids are substituted with an aromatic substituent in the beta-position and N-bromosuccinimide is used as the halogenation reagent. The scope of mainly the oxidative bromo-decarboxylation reaction is presented, and a tentative mechanism is proposed.
Terminal alkynes from aldehydes via dehydrohalogenation of (Z)-1-iodo-1-alkenes with TBAF
作者:Mira Beshai、Bhartesh Dhudshia、Ryan Mills、Avinash N. Thadani
DOI:10.1016/j.tetlet.2008.09.060
日期:2008.11
Terminal alkynes were prepared in near quantitative yields via dehydrohalogenation of (Z)-1-iodo-1-alkenes with tetrabutylammonium fluoride (TBAF) under mild conditions. The methodology was expanded to include a one-pot, direct synthesis of terminal alkynes from aldehydes Without the necessity of isolating and purifying the intermediate iodoalkene. (C) 2008 Elsevier Ltd. All rights reserved.