Towards functional fluorous surfactants. Synthesis of hydrophilic fluorous 1,2,3-triazolylmethyl ethers and di(1,2,3-triazolylmethyl) ethers
摘要:
Copper(I)-accelerated Huisgen-Meldal dipolar cycloaddition reactions between polyfluoroalkyl azides and propargyl ethers of n-octanol and of triethyleneglycol monomethyl ether exhibited variation in yield of 1,2,3-triazol-4-ylmethyl ethers. Microwave acceleration, and in situ generation of the azides, provided improvements in yield and efficiency. In contrast, very good yields of equivalent fluorous triazoles were obtained from a range of n-alkyl azides with propargyl ethers of perfluorohexylethanol and of perfluoroheptylmethanol through conventional copper(I)-promoted reactions. Together, the resulting substances with systematic variations in polyfluoroalkyl and alkyl substituent length and position of substitution, and degree of oxygen content, make up small libraries of hybrid fluorous 1,2,3-triazol-4-ylmethyl ethers as candidates for study as hydrophilic fluorous surfactants. In addition, a pilot sample of di(1,2,3-triazol-4-ylmethyl) ethers with 1'-octyl-1-polyfluoroalkyl-substituents and 1'-nonyl-1-perfluorooctylethyl substituents were synthesised for the first time in an effort to develop more functional, fluorous surfactants. (C) 2011 Elsevier B.V. All rights reserved.
Synthesis of novel 1-substituted triazole linked 1,2-benzothiazine 1,1-dioxido propenone derivatives as potent anti-inflammatory agents and inhibitors of monocyte-to-macrophage differentiation
作者:Malla Reddy Gannarapu、Sathish Babu Vasamsetti、Nagender Punna、Srigiridhar Kotamraju、Narsaiah Banda
DOI:10.1039/c5md00171d
日期:——
Compounds12g,12iand12lmodulate pro-inflammatory cytokine production by inhibiting monocyte differentiation.
化合物12g,12i和12l通过抑制单核细胞分化来调节促炎细胞因子的产生。
Synthesis of novel 1,2,3-triazole substituted-N-alkyl/aryl nitrone derivatives, their anti-inflammatory and anticancer activity
novel 1,2,3-triazole substituted N-phenyl nitrone derivatives 5a–e were prepared in three steps starting from 1-substituted-1,2,3-triazole-4-carbaldehydes 2 via Schiff's base formation, reduction followed by oxidation. Similarly, 1,2,3-triazole substituted N-alkylnitrone derivatives 6a–p were prepared in single step starting from compound 2 on reaction with N-alkyl hydroxylamine hydrochlorides. All the
Titration characteristics of fluorous 1,2,3-triazol-4-ylmethyl ethers, bis(1,2,3-triazol-4-ylmethyl) ethers and bis(1,2,3-triazol-4-ylmethyl) amines
作者:Dominic V. Francis、Jason B. Harper、Roger W. Read
DOI:10.1016/j.jfluchem.2016.10.012
日期:2016.12
changes in chemical shift of the H5 triazolyl signals provide consistent information that support weak but evident cooperativity between the triazolyl rings in bis-triazolylmethyl ethers. This is overridden by replacement of the ether oxygen with a secondary amino group, but similar principles apply in subsequent protonation. An attempt is made to interpret the cooperative behavior.
用1 H NMR光谱法检测了用樟脑磺酸滴定的一系列氟双(1,2,3-三唑-4-基甲基)分子,以研究质子化时可能发生的任何构象变化;设想该信息将有助于预测其作为配体的潜力。基于质子平衡常数和H5三唑基信号化学位移变化的结构活性关系提供了一致的信息,该信息支持双三唑基甲基醚中三唑基环之间的弱但明显的协同作用。这可以通过用仲氨基取代醚氧来取代,但是类似的原理适用于随后的质子化。试图解释合作行为。
Antitubercular activity of 1,2,3-triazolyl fatty acid derivatives
作者:Diego G. Ghiano、Agustina de la Iglesia、Nina Liu、Peter J. Tonge、Héctor R. Morbidoni、Guillermo R. Labadie
DOI:10.1016/j.ejmech.2016.09.086
日期:2017.1
being most of them active with some of the analogs displaying activity at micromolar concentration. The most potent member of the series has the triazole moiety on the C-2 position with a carbon chain of eight or ten carbon atoms. The 1,5-isomers of the most active analog were significantly less active than the original isomer. The activity of the selected hit was assayed on several clinical MTB multi-drug
advantageous under copper(II) acetate‐mediated conditions. The copper(II) acetate‐mediated formation of the three triazolyl groups in a tris(triazolyl)‐based ligand occurs sequentially with an inhibitory effect in the last step. The kinetic investigations of the ligand‐assisted reactions reveal an interesting mechanistic dependence on the relative affinity of azide and alkyne to copper (II). In addition
聚三唑配体,例如广泛使用的三[(1-苄基-1 H -1,2,3-三唑-4-基)甲基]胺(TBTA),被证明有助于乙酸铜(II)介导的叠氮化物-炔烃涉及非螯合叠氮化物的环加成(AAC)反应。三(2- 4-[[(二甲氨基)甲基] -1 H1,2,3-三唑-1-基}乙胺(DTEA)在许多反应中均优于TBTA。DTEA在各种极性和非极性溶剂(包括水和甲苯)中的令人满意的溶解度,使其在乙酸铜(II)介导的条件下具有优势。在基于三(三唑基)的配体中,乙酸铜(II)介导的三个三唑基的形成顺序发生,并在最后一步具有抑制作用。配体辅助反应的动力学研究揭示了一种有趣的机制,其依赖于叠氮化物和炔烃对铜(II)的相对亲和力。除了将乙酸铜(II)介导的AAC反应的范围扩大到包括非螯合叠氮化物之外,这项工作还为标题反应与炔烃氧化均偶联反应之间的机理协同作用提供了证据。