3-(5-)-Amino-o-diarylisoxazoles: Regioselective synthesis and antitubulin activity
作者:Dmitry V. Tsyganov、Victor N. Khrustalev、Leonid D. Konyushkin、Mikhail M. Raihstat、Sergei I. Firgang、Roman V. Semenov、Alex S. Kiselyov、Marina N. Semenova、Victor V. Semenov
DOI:10.1016/j.ejmech.2013.12.006
日期:2014.2
materials for the synthetic scheme were easily available from plant extracts. The targeted molecules were further tested in the phenotypic seaurchinembryo assay to identify compounds with antimitotic microtubule destabilizing activity. Structure–activityrelationship studies suggested that the structural features essential for potent antiproliferative activity include: 1) 5-aminoisoxazole bridge linking
A cascade process for the straightforward one-pot conversion of β-ketonitriles into β-hydroxyamides is presented. The process, that proceeds in water employing the arene-ruthenium(II) complex [RuCl2(η6-p-cymene)P(4-C6H4F)2Cl}] as catalyst in combination with sodium formate, involves the initial hydration of the β-ketonitrile substrates to generate the corresponding β-ketoamide intermediates, which
提出了一种简单的一锅法将β-乙腈转化为β-羟酰胺的级联方法。的过程中,在水中进行采用芳烃-钌(II)络合物将[RuCl 2(η 6 - p -cymene)P(4-C 6 H ^ 4 F)2氯}]如甲酸钠催化剂组合该方法涉及β-酮腈底物的初始水合反应,以生成相应的β-酮酰胺中间体,然后对其进行羰基的转移氢化(TH)。雇用40个不同的β族-乙腈具有不同的取代模式,已经确定了该方法的范围和局限性。
Synthesis of 1,2-Diketones from β-Keto Nitriles via a Protection-Oxidative-Decyanation-Deprotection Protocol
were prepared fromβ-ketonitriles via a three-step protocol including the protection of the ketones with methoxyamine, oxidative decyanation, and microwave-assisted deprotection in the final step. This approach provides a novel and efficient access to a wide scope of symmetric and unsymmetric 1,2-diketones using molecular oxygen as the oxidant in the decyanation process. β-ketonitriles - oxygen - oxidative
intramolecular cyclization of electron-rich α-aryl ketones. The alkoxy substituent on the benzene ring in the substrates was essential for an efficient cyclization to occur. This novel method allows the construction of benzo[b]furan rings by joining the O-atom on the side chain to the benzene ring via direct oxidative aromatic C−O bond formation.
通过FeCl 3介导的富电子α-芳基酮的分子内环化,获得了多种3-官能化的苯并[ b ]呋喃。底物中苯环上的烷氧基取代基对于有效环化的发生至关重要。这种新方法允许通过直接氧化芳香族C-O键形成将侧链上的O原子与苯环相连,从而构造苯并[ b ]呋喃环。
Synthesis of functionally substituted benzo[c]pyrylium salts