24772-63-2Relevant academic research and scientific papers
Highly Selective Radical Monoreduction of Dihalides Confined to a Dynamic Supramolecular Host
Petroselli, Manuel,Rebek, Julius,Yu, Yang
supporting information, p. 3284 - 3287 (2021/02/05)
Reduction of alkyl dihalide guests (2–5 and 7) with trialkylsilanes (R3SiH) was performed in water-soluble host 1 to investigate the effects of confinement on fast radical reactions (k≥103 m?1 s?1). High selectivity (>95 %) for mono-reduced products was observed for primary and secondary dihalide guests under mild conditions. The results highlight the importance of host–guest complexation rates to modulate the product selectivity in radical reactions.
Probing the Existence of a Metastable Binding Site at the β2-Adrenergic Receptor with Homobivalent Bitopic Ligands
Gaiser, Birgit I.,Danielsen, Mia,Marcher-R?rsted, Emil,R?pke J?rgensen, Kira,Wróbel, Tomasz M.,Frykman, Mikael,Johansson, Henrik,Br?uner-Osborne, Hans,Gloriam, David E.,Mathiesen, Jesper Mosolff,Sejer Pedersen, Daniel
, p. 7806 - 7839 (2019/09/07)
Herein, we report the development of bitopic ligands aimed at targeting the orthosteric binding site (OBS) and a metastable binding site (MBS) within the same receptor unit. Previous molecular dynamics studies on ligand binding to the β2-adrenergic receptor (β2AR) suggested that ligands pause at transient, less-conserved MBSs. We envisioned that MBSs can be regarded as allosteric binding sites and targeted by homobivalent bitopic ligands linking two identical pharmacophores. Such ligands were designed based on docking of the antagonist (S)-alprenolol into the OBS and an MBS and synthesized. Pharmacological characterization revealed ligands with similar potency and affinity, slightly increased β2/β1AR-selectivity, and/or substantially slower β2AR off-rates compared to (S)-alprenolol. Truncated bitopic ligands suggested the major contribution of the metastable pharmacophore to be a hydrophobic interaction with the β2AR, while the linkers alone decreased the potency of the orthosteric fragment. Altogether, the study underlines the potential of targeting MBSs for improving the pharmacological profiles of ligands.
Alkynol natural products target ALDH2 in cancer cells by irreversible binding to the active site
Heydenreuter, Wolfgang,Kunold, Elena,Sieber, Stephan A.
supporting information, p. 15784 - 15787 (2015/11/10)
Falcarinol and stipudiol are natural products with potent anti-cancer activity found in several vegetables. Here, we use a chemical proteomic strategy to identify ALDH2 as a molecular target of falcarinol in cancer cells and confirm enzyme inhibition via covalent alkylation of the active site. Furthermore, the synthesis of stipudiol led to the observation that ALDH2 exhibits preference for alkynol-based binders. Inhibition of ALDH2 impairs detoxification of reactive aldehydes and limits oxidative stress response, two crucial pathways for cellular viability.
Ionic liquids as reagents and solvents in conjunction with microwave heating: Rapid synthesis of alkyl halides from alcohols and nitriles from aryl halides
Leadbeater, Nicholas E.,Torenius, Hanna M.,Tye, Heather
, p. 2253 - 2258 (2007/10/03)
We show that using ionic liquids as reagents in conjunction with microwave heating it is possible to prepare primary alkyl halides from the corresponding alcohols rapidly. Using ionic liquids as solvents in conjunction with microwave heating it is possible to prepare aryl nitriles from the corresponding aryl bromides or iodides. The scope and limitations of using microwave-promotion as a tool in these reactions is discussed.
Low-Frequency Raman Spectra of Even α,ο-Disubstituted n-Alkanes
Viras, Kyriakos,Viras, Fontini,Campbell, Carl,King, Terence A.,Booth, Colin
, p. 3479 - 3483 (2007/10/02)
Low-frequency Raman spectra of even α,ο-disubstituted n-alkanes have been recorded.The major features in the spectra arise from whole-chain longitudinal and bending vibrations.The effects of end group, chain lenght, and temperature on the frequencies of these vibrations are described, and the frequencies of the longitudinal vibrations are interpreted in terms of the chain model of Minoni and Zerbi.
