[EN] COUMARIN DERIVATIVES OF SUGAR ANALOGS AND USES THEREOF [FR] DÉRIVÉS DE COUMARINE D'ANALOGUES DE SUCRE ET LEURS UTILISATIONS
摘要:
Provided herein are coumarin derivatives of sugar analogs which are used to measure the rate of hydrolysis of these sugar analogs when contacted with a glycosidase. The reactivity of the coumarin derivatives serves as a convenient method for estimating for the rate of hydrolysis of sugar analogs when used a promoiety with cytotoxic drugs to generate senolytic agents with improved selectivity for killing senescent cells.
Addressing the Structural Complexity of Fluorinated Glucose Analogues: Insight into Lipophilicities and Solvation Effects
作者:Jacob St‐Gelais、Émilie Côté、Danny Lainé、Paul A. Johnson、Denis Giguère
DOI:10.1002/chem.202002825
日期:2020.10.21
glucopyranose analogues at positions C‐2, C‐3, C‐4, and C‐6. This systematic investigation allowed us to perform direct comparison of 19F resonances of fluorinatedglucoseanalogues and also to determine their lipophilicities. Compounds with a fluorine atom at C‐6 are usually the most hydrophilic, whereas those with vicinal polyfluorinated motifs are the most lipophilic. Finally, the solvation energies
Synthesis of Protected 3-Deoxy-3-fluoro- and 4-Deoxy-4-fluoro-<scp>d</scp>-galactopyranosides from Levoglucosan
作者:Danny Lainé、Vincent Denavit、Denis Giguère
DOI:10.1021/acs.joc.7b00543
日期:2017.5.5
Fluorinated carbohydrates are invaluable tools to study various biochemical processes. Herein, we describe a new strategy to access orthogonally protected 3-deoxy-3-fluorogalactopyranose and acetylated 4-deoxy-4-fluorogalactopyranose. Starting from inexpensive levoglucosan, most reactions were performed on a gram scale and allowed excellent regio- and stereocontrol with a minimal use of protection/deprotection
Efficient synthesis of a galectin inhibitor clinical candidate (TD139) using a Payne rearrangement/azidation reaction cascade
作者:Jacob St-Gelais、Vincent Denavit、Denis Giguère
DOI:10.1039/d0ob00910e
日期:——
Selective galectin inhibitors are valuable research tools and could also be used as drug candidates. In that context, TD139, a thiodigalactoside galectin-3 inhibitor, is currently being evaluated clinically for the treatment of idiopathic pulmonary fibrosis. Herein, we describe a new strategy for the preparation of TD139. Starting from inexpensive levoglucosan, we used a rarely employed reaction cascade:
Stereoselective Synthesis of Fluorinated Galactopyranosides as Potential Molecular Probes for Galactophilic Proteins: Assessment of Monofluorogalactoside–LecA Interactions
galactophilic lectins. The first transverse relaxation‐optimized spectroscopy (TROSY) NMR experiments were performed on these interactions, examining chemical shift perturbations of the backbone resonances of LecA, a virulence factor from Pseudomonas aeruginosa. Moreover, taking advantage of the fluorine atom, the 19FNMR resonances of the monofluorogalactopyranosides were directly monitored in the presence
六吡喃糖苷支架上的氟原子取代了羟基,可能会为研究各种生化过程提供宝贵的工具。作为正在进行的制备氟化碳水化合物的活动的一部分,对涉及一系列单氟化和多氟化吡喃半乳糖苷的合成和生物学评估的系统研究进行了描述。已经使用Chiron方法制备了各种单氟吡喃半乳糖苷,三氟和四氟吡喃半乳糖苷。考虑到文献中这些化合物的稀缺性,除了合成以外,还评估了它们的生物学特性。首先,与正常细胞相比,使用正常人和小鼠细胞研究了含氟化合物作为抗增殖剂。大多数氟化化合物均未显示出抗增殖活性。其次,这些碳水化合物探针被用作半乳凝集素的潜在抑制剂。对这些相互作用进行了首次横向弛豫优化光谱(TROSY)NMR实验,检查了LecA骨架毒性的化学位移扰动,这是一种毒力因子。铜绿假单胞菌。此外,利用氟原子,在存在和不存在LecA的情况下,直接监测单氟吡喃半乳糖苷的19 F NMR共振,以评估配体结合。最后,这些结果通过等温滴定量热法实验
Synthesis of fluorinated thiodigalactoside analogues
In this work, we report the first synthesis of fluorinated thiodigalactoside analogues. We used tri-isopropylsilyl thioglycosides as masked glycosyl thiol nucleophiles for the elaboration of two monofluorinated heterodimers, one difluorinated homodimer, and one difluorinated heterodimer. Moreover, we also present an alternative synthesis of 3-deoxy-3-fluorogalactose and 4-deoxy-4-fluorogalactose from