Design and Synthesis of New Bile AcidSterol Conjugates Linked<i>via</i>1,2,3-Triazole Ring
作者:Tomasz Pospieszny
DOI:10.1002/hlca.201500118
日期:2015.10
conjugates have been obtained from bile acids and sterol derivatives using ‘click chemistry’. Intermolecular 1,3‐dipolar cycloaddition of the propargyl ester of bile acids (lithocholic, deoxycholic, and cholic acid) and azide derivatives of sterols (ergosterol and cholesterol) gave a new bile acidsterol conjugates linked with a 1,2,3‐triazole ring. The structures of all products were confirmed by spectroscopic
使用“点击化学”从胆汁酸和固醇衍生物中获得了一种新的类固醇结合物。分子间1,3 -胆汁酸(石胆酸,脱氧胆酸和胆酸)和甾醇的叠氮化物衍生物(麦角固醇和胆固醇)的炔丙基酯的偶极环加成,得到一个新的胆汁酸固醇缀合物与1,2,3-联三唑环。所有产品的结构均通过光谱(1 H和13 C NMR和FT IR),质谱(ESI-MS)和计算机生物学活性评估方法(PASS)以及PM5半经验分析确定方法。
Synthesis and <i>in Vitro</i> Antibacterial Evaluation of Novel 4-Substituted 1-Menthyl-1,2,3-triazoles
Menthyl 1,4-disubstituted 1,2,3-triazole derivatives of hydroxybenzaldehydes, phenols and bile acids were synthesized via click chemistry. The novel synthesized compounds were evaluated for their in vitro antibacterial activity against Enterococcus faecium, and Staphylococcus aureus as Gram-positive bacteria. Some derivatives illustrated strong inhibitory effect against E. faecium with the minimum inhibitory concentration (MIC) values ranged from 1–3 µM, where cefixime as a positive control revealed MIC value of 35 µM. The structures of the synthesized compounds were confirmed by different spectroscopic techniques including 1H-NMR, 13C-NMR, high resolution (HR)-MS, IR and X-ray crystallographic analysis.
bis(cholane)-24,24′-diazides with aliphatic dipropargyl esters, or bis(cholane)-24,24′-dipropargyl esters with aromatic diazides, or by cyclization-dimerization of bile acid derivatives possessing both azide and acetylene groups in the same molecule. 1,3-dipolar cycloaddition - azides - cholaphanes - copper - macrocycles
Synthesis and anticancer activity of bile acid dendrimers with triazole as bridging unit through click chemistry
作者:Devaraj Anandkumar、Perumal Rajakumar
DOI:10.1016/j.steroids.2017.06.007
日期:2017.9
Triazole-based novel dendrimers with bile acid surface groups have been synthesized through click chemistry by divergent approach and characterized by spectral data. All the dendrimers exhibit excellent anticancer activity. Higher-generation dendrimers exhibit better anticancer activity than the lower-generation dendrimers.
Design, synthesis, spectral and theoretical study of new bile acid–sterol conjugates linked via 1,2,3-triazole ring
作者:Tomasz Pospieszny、Hanna Koenig
DOI:10.1016/j.steroids.2021.108934
日期:2021.12
prepared from bile acids and sterol derivatives using click chemistry method. The azide-alkyne Huisgen cycloaddition (intermolecular 1,3-dipolarcycloaddition) of the propargyl ester of lithocholic, deoxycholic, cholic acid as well as dehydrocholic acids and azide derivatives of cholesterol gave a new bile acid–sterol conjugates linked with a 1,2,3-triazole ring. Previously, bile acids were converted into