描述了包括插入 DNA 的 9-苯胺吖啶 (9-AnA) 核心和甲基三氮烯 DNA 甲基化部分的分子杂合体的有效合成。亲核芳香取代 (S N Ar) 和亲电芳香取代 (EAS) 反应使用容易获得的起始材料提供了快速进入新型双功能抗癌分子的途径。评估嵌合体的抗癌活性。在用各种癌细胞系进行的抗增殖试验中,嵌合体7b在低微摩尔 IC 50值下表现出最高的抗肿瘤活性。相比之下,化合物7b 的表现优于安吖啶和 AHMA 等 DNA 嵌入药物。嵌合体7b 的机理研究 表明双重作用机制:与三氮烯结构部分相关的 DNA 修复蛋白 MGMT 的甲基化和通过吖啶核心的插入抑制 Topo II。
Simmonds, Richard J.; Mallawaarachchi, Wickramaratna; Mallawaarachchi, Padma A., journal of the chemical society-perkin transactions 2, 1993, # 7, p. 1399 - 1404
Influence of Serum Albumins on Decomposition Rates of Para- Substituted 1-phenyl-3-methyltriazenes and 5-(3-methyl-1-triazeno)imidazole-4-carboxamide in Near Physiological Conditions
作者:Franco Delben、Sergio Paoletti、Giorgio Manzini、Carlo Nisi
DOI:10.1002/jps.2600700815
日期:1981.8
The influence of human serumalbumin on the decompositionrates of some arylmonomethyltriazenes in buffered aqueous solution was investigated. From the experimental data, a model for the triazene-albumin interaction was derived, and the thermodynamic parameters were systematically calculated by two independent methods. The results show marked dependence of the energetics of binding on the substituent
Suzuki Coupling of Activated Aryltriazenes for Practical Synthesis of Biaryls from Anilines
作者:Dongsheng Guo、Weijia Shi、Gang Zou
DOI:10.1002/adsc.202200433
日期:2022.7.19
palladium-catalyzed Suzukicoupling of aryltriazenes activated by a sulfonyl group at N3 atom under the common basic conditions. Benefiting from elimination of stoichiometric acid activators, activated aryltriazenes could efficiently couple with arylboronic acids to afford diaryls in modest to excellent yields by using a simple catalyst at low loading, 0.3 mol% Pd(PPh3)2Cl2. Scope and limitation of the coupling are
Light-Deactivated Fluorescent Probes (FLASH-Off) for Multiplexed Imaging
作者:Elias A. Halabi、Ralph Weissleder
DOI:10.1021/jacs.3c00170
日期:——
Highly multiplexed, cyclic fluorescence imaging has advanced our understanding of the biology, evolution, and complexity of human diseases. Currently available cyclic methods still have considerable limitations including the need for long quenching times and extensive wash steps. Here, we report a new series of fluorochromes that can be efficiently inactivated by a single light pulse (∼405 nm) by means
[EN] PROBES FOR FLUORESCENCE IMAGING<br/>[FR] SONDES POUR IMAGERIE PAR FLUORESCENCE
申请人:MASSACHUSETTS GEN HOSPITAL
公开号:WO2023192653A1
公开(公告)日:2023-10-05
The present disclosure provides photocleavable rhodamine probes that facilitate live- and fixed-cell immunofluorescence. The ultra-fast spirocyclization of the dye following cleavage depletes the fluorescence signal, enabling cyclic multiplexed imaging.
Kinetic Study of the Hydrolysis of 1-(4-nitrophenyl)-3-methylitriazene in Aqueous Solution and in the Presence of Surfactants
作者:Cynthia Ebert、Lucia Lassiani、Mara Lovrecich、Carlo Nisi、Fulvio Rubessa、Paolo Linda
DOI:10.1002/jps.2600731206
日期:1984.12
The hydrolysis of 1-(4-nitrophenyl)-3-methyltriazene in aqueoussolution has been studied over a pH range of 3-14. The effect of the anionic and cationic surfactants (sodium lauryl sulfate and hexadecyltrimethylammonium bromide) on the rate of hydrolysis was investigated. The quaternary ammonium bromide causes a rate decrease at all pH values studied, while sodium lauryl sulfate enhances the acid-catalyzed