Synthese und zytostatische Wirkung einiger 2-Phenyl-3-alkyl(aryl)-2, 3-dihydro-1, 3, 2(λ5)-benzoxazaphosphorin-4-on-Derivate
作者:Krysztof Kostka、Marek Porada
DOI:10.1002/ardp.19923250603
日期:——
Die Herstellung von 2, 3‐Dihydro‐1, 3, 2‐benzoxazaphosphorin‐4‐on‐Derivaten 1–10 und deren 2‐Oxo‐Verbindungen (11–12) wird beschrieben. Die Verbindungen 1 und 12 wirken zytostatisch.
Hydrophobicity and glutathione peroxidase-like activity of substituted salicyloyl-5-seleninic acids: Re-investigations on aromatic selenium compounds based on their hydrophobicity
作者:Sun-Chol Yu、Dong-Myong Ri、Hartmut Kühn
DOI:10.1016/j.jorganchem.2018.02.045
日期:2018.5
salicylic acid derivatives exhibit glutathioneperoxidase (GPx)-like activities higher than or equal to ebselen [Yu et al., Chem. Eur. J., 2008, 14, 7066; Org. Biomol. Chem., 2010, 8, 828]. For understanding the absence of GPx-like activity of the homologue of 5-seleninic anhydride of salicyloylglycine with a loger side chain, we have further synthesized 19 new derivatives (5-seleninic acids of methyl
先前我们已经表明,一些5-硒化水杨酸衍生物表现出的谷胱甘肽过氧化物酶(GPx)样活性高于或等于依伯硒仑[Yu et al。,Chem。欧元。J.,2008,14,7066; 单位 生物分子 化学 ,2010,8,828]。为了解不存在具有loger侧链的水杨酰甘氨酸5-硒酸酐的同系物没有GPx样活性的情况,我们进一步合成了19种新衍生物(甲基或苯基水杨酸酯的5-硒酸,N-水杨酰ω-羧烷基胺或ñ-水杨酰基烷基/苯基胺,及其一些二硒化物)。某些带有长侧链或环己基的5-硒酸,无论其衍生自ω-羧烷基胺还是简单的烷基胺,都没有GPx样的活性。缺乏类似GPx的活性,使我们可以定量地将上述3个系列同源物的GPx活性与其疏水性(ClogP)相关联,在每个系列中均显示出令人满意的相关性。然后将分子疏水性广泛应用于包括二芳基二硒化物和依布硒仑衍生物在内的各种已知的芳香族硒GPx模拟物,以相对定量的方式解释其G
One-Pot Synthesis of Fused Pyridazino[4,5-b][1,4]oxazepine-diones via Smiles Rearrangement
Fused pyridazino[4,5-b][1,4]oxazepine-diones were easily obtained in moderate to excellent yields via Smiles rearrangement. The synthetic approach is supported by a one-pot couplingSmiles rearrangement-cyclization process. This process has potential applications in the synthesis of biologically and medicinally relevant compounds.
Trifluoroacetic Acid-Mediated Denitrogenative <i>ortho</i>-Hydroxylation of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones: A Metal-Free Approach
作者:Kanagaraj Madasamy、Madasamy Hari Balakrishnan、Ramaraju Korivi、Subramaniyan Mannathan
DOI:10.1021/acs.joc.2c00354
日期:2022.7.1
An efficient trifluoroacetic acid-mediated denitrogenative hydroxylation of 1,2,3-benzotriazin-4(3H)-ones is described. This metal-free approach is compatible with a wide range of 1,2,3-benzotriazin-4(3H)-ones, affording ortho-hydroxylated benzamides in good to high yields with a short reaction time. The reaction is believed to proceed via a benzene diazonium intermediate. The synthetic utility of
描述了一种有效的三氟乙酸介导的 1,2,3-benzotriazin-4(3 H )-ones 的脱氮羟基化。这种不含金属的方法与多种 1,2,3-benzotriazin-4(3 H )-one相容,可在较短的反应时间内以良好至高产率提供邻羟基化苯甲酰胺。据信该反应通过苯重氮中间体进行。该反应的合成效用通过以良好收率制备抗微生物药物利肝素 C 和苯并恶嗪-2,4(3 H )-二酮类化合物得到成功证明。
<scp>Iron‐Catalyzed</scp> Reductive C(aryl)—Si <scp>Cross‐Coupling</scp> of Diaryl Ethers with Chlorosilanes
作者:Pei Liu、Baowei Wu、Xuefeng Cong、Jie Kong
DOI:10.1002/cjoc.202300593
日期:2024.3.15
shows high activity in the successive cleavage of unactivated C(aryl)—Obonds of diaryl ethers and strong electrophilic Si—Cl bonds of chlorosilanes, allowing their cross-coupling in a reductive fashion. The low-valent iron species generated in situ by reduction of FeCl2 with iPrMgCl was proposed, which prefers to initially cleavage the C(aryl)—O bond of diaryl ethers with the chelation help of an o-amide