噻吩基烯丙胺很容易从相应的噻吩基醛中获得,与马来酸酐和三氟甲基马来酸酐反应,形成具有噻吩并[2,3- f ]异吲哚核心的酸。该反应序列涉及两个连续步骤:初始烯丙胺的氮原子的酰化和分子内狄尔斯-阿尔德乙烯基芳烃(IMDAV)反应。对所提出方法的范围和局限性进行了彻底研究。借助X射线分析和DFT计算表明,关键步骤IMDAV反应通过外过渡态进行,导致目标杂环的单一非对映异构体的排他性形成。所获得的功能取代的噻吩并[2,3- f ]异吲哚羧酸是用于进一步转化和生物筛选的潜在有用底物。对所得化合物的抗菌评估表明,1-氧代-2-(3-(三氟甲基)苯基)六氢苯并[4,5]噻吩并[2,3- f ]异吲哚-10-甲酸是该化合物中活性最高的样品。合成文库。它对金黄色葡萄球菌、屎肠球菌、蜡样芽孢杆菌、藤黄微球菌等敏感的革兰氏阳性菌以及大肠杆菌、荧光假单胞菌等革兰氏阴性菌具有抗菌活性,MIC值范围为4~ 64μg·mL
Rare Earth Triflates/Chlorotrimethylsilane-Promoted One-Pot Synthesis of Enals
摘要:
Some heteroaromatic aldehydes were subjected to conditions promoting the rare earth triflates/chlorotrimethylsilane-promoted one-pot synthesis of enals. As a result, diverse alpha,beta-unsaturated aldehydes were obtained in moderate yields.
Heck Reactions of Acrolein or Enones and Aryl Bromides – Synthesis of 3‐Aryl Propenals or Propenones and Consecutive Application in Multicomponent Pyrazole Syntheses
作者:Marvin Stephan、Jesco Panther、Fabio Wilbert、Pauline Ozog、Thomas J. J. Müller
DOI:10.1002/ejoc.202000066
日期:2020.4.16
The Heck reaction of (hetero)aryl bromides and acrolein or vinyl ketones using CataCXium® Ptb as a ligand, NaHCO3 as a base, and nBu4NCl provides an efficient access to 3‐(hetero)aryl propenals/propenones, which are directly employed in consecutive multicomponent syntheses of pyrazoles in a one‐pot fashion.
使用CataCXium®Ptb作为配体,NaHCO 3作为碱和n Bu 4 NCl进行(杂)芳基溴化物和丙烯醛或乙烯基酮的Heck反应,可以有效地获得3-(杂)芳基丙烯/丙烯酮。以单罐方式直接用于吡唑的连续多组分合成中。
ANTICANCER 1,3-DIOXANE-4,6-DIONE DERIVATIVES AND METHOD OF COMBINATORIAL SYNTHESIS THEREOF
申请人:National Guard Health Affairs
公开号:US20200290975A1
公开(公告)日:2020-09-17
Compounds, methods of synthesis, and methods of cancer treatment by arylidene-1,3-dioxane-4,6-diones. A Meldrum's acid-based chemistry and hybrid solid-liquid method. The method includes protection of ketone and aldehyde components and simultaneous immobilization on the solid phase, introduction of substituents, grafts and derivatives compatible with the protection, detachment and restoration of active carbonyl reactivity, reaction of ketone library with malonate, reacting of the products with the aldehyde library in liquid phase and separation of the products by preparative HPLC.
The Heckarylation of acrolein with a variety of condensed aryl and heteroaryl halides is described. Depending on the substrate, up to 87% isolated yield to the expected aldehydes was achieved. When the reaction was run on diethylacetal acrolein, the choice of catalytic system dramatically affected the selectivity of the reaction: the catalyst system based on Herrmann’s palladacycle complex gave mainly
A heterogeneous tetrakis(ammine)palladium-NaY zeolite [Pd(NH3)4]/NaY} catalyst was applied successfully to the Heckarylation of acroleindiethylacetal using a large variety of aryl and heteroaryl bromides. Depending on the reaction conditions (Heck versus Cacchi) good to high selectivities toward the 3-arylpropionicesters or to the cinnamaldehydes were achieved, respectively. Under classical Heck
Anticancer 1,3-dioxane-4,6-dione derivatives and method of combinatorial synthesis thereof
申请人:National Guard Health Affairs
公开号:US11161823B2
公开(公告)日:2021-11-02
Compounds, methods of synthesis, and methods of cancer treatment by arylidene-1,3-dioxane-4,6-diones. A Meldrum's acid-based chemistry and hybrid solid-liquid method. The method includes protection of ketone and aldehyde components and simultaneous immobilization on the solid phase, introduction of substituents, grafts and derivatives compatible with the protection, detachment and restoration of active carbonyl reactivity, reaction of ketone library with malonate, reacting of the products with the aldehyde library in liquid phase and separation of the products by preparative HPLC.