Systematic Investigation of Tether Length and Phosphorus Configuration in Backbone Constrained Macrocyclic Nucleic Acids to Modulate Binding Kinetics for RNA
作者:Tamilselvan Rajasekaran、Graeme C. Freestone、Rodrigo Galindo-Murillo、Barbara Lugato、Hans Gaus、Michael T. Migawa、Eric. E. Swayze、Thomas E. Cheatham、Punit P. Seth、Stephen Hanessian
DOI:10.1021/acs.joc.2c02796
日期:2023.3.17
into ONs, and biophysical characterization of the modified ONs. The size of the macrocyclic tether and configuration at phosphorus had profound effects on hybridization kinetics. ONs containing 12- and 13-membered rings exhibited faster on-rates (up to 5-fold) and off-rates (up to 161-fold). In contrast, ONs using the larger ringsize macrocycles generally exhibited smaller changes in binding kinetics
我们最近描述了一种化学策略,以适合 Watson-Crick 碱基配对的构象预组织三核苷酸亚基,以使用双膦酸酯桥接烃系链提供 11- 和 15 来调节单链寡核苷酸 (ON) 的结合动力学-元大环类似物。在这份手稿中,我们描述了大环 12、13、14 和 16 元烃桥核苷酸三聚体的所有八种 P 立体异构体的合成、它们在 ON 中的掺入以及修饰 ON 的生物物理表征。大环链的大小和磷的构型对杂交动力学有深远的影响。包含 12 元环和 13 元环的 ON 表现出更快的结合率(高达 5 倍)和解离率(高达 161 倍)。相比之下,相对于未修饰的 DNA,使用较大环尺寸大环化合物的 ON 通常表现出较小的结合动力学变化。有趣的是,尽管在热变性实验中适度不稳定,但基于解离常数,一些类似物保留了对 RNA 的显着结合亲和力,突出了在评估新型核酸类似物时测量解离常数与双链体热稳定性的潜在效用。总的来说,我
The present disclosure provides a trinucleotide comprising the formula below or an oligomeric compound comprising the formula below:
Intramolecular Formal [4 + 2] Cycloadditions: Synthesis of Spiro Isoindolinone Derivatives and Related Molecules
作者:Yarkali Krishna、Fujie Tanaka
DOI:10.1021/acs.orglett.1c00283
日期:2021.3.5
Acid-catalyzed intramolecular reactions of isoindolinone-derived hydroxylactam derivatives bearing enones or enals that afford spiro isoindolinone derivatives and related molecules have been developed. From the hydroxylactam moieties, N-acylenamides were generated in situ and reacted with the enone and the enal moieties via formal [4 + 2] cycloaddition reactions to construct cyclohexanone- and dihydropyran-fused