1-Methylpyridinium-4-(4-phenylmethanethiosulfonate) iodide, MTS-MPP+, a novel scanning cysteine accessibility method (SCAM) reagent for monoamine transporter studies
摘要:
A novel substituted cysteine accessibility method (SCAM) reagent was developed for monoamine uptake transporters. The new reagent, MTS-MPP+, was a derivative of the neurotoxin and transporter substrate MPP+. MTS-MPP+ labeled cysteine residues introduced into the serotonin transporter protein. Although it did not prove to be a substrate, as is MPP+, it appears to label cysteine residues lining the permeation pore of the transporter more readily than currently available nonspecific SCAM reagents. (c) 2006 Elsevier Ltd. All rights reserved.
Encapsulation Enhanced Dimerization of a Series of 4-Aryl-<i>N</i>-Methylpyridinium Derivatives in Water: New Building Blocks for Self-Assembly in Aqueous Media
The construction of supramolecular systems in aqueousmedia is still a great challenge owing to the limited sources of buildingblocks. In this study, a series of 4‐aryl‐N‐methylpyridinium derivatives have been synthesized. They formed very stable host–guest (1:2) complexes with CB[8] in water (binding constants up to 1014 M−2) with the two guest molecules arranged in a head‐to‐tail manner and the
由于结构单元的来源有限,在水性介质中构建超分子系统仍然是一个巨大的挑战。在这项研究中,已经合成了一系列的4-芳基-N-甲基吡啶鎓衍生物。他们与水中的CB [8]形成了非常稳定的宿主-客体(1:2)配合物(结合常数高达10 14 M -2),两个客体分子以头尾相接的方式排列,并且配合物表现出很高的通过1 H NMR和UV / Vis光谱研究,ITC和晶体学分析揭示了其热稳定性。
A Bifunctional Reagent Designed for the Mild, Nucleophilic Functionalization of Pyridines
作者:Patrick S. Fier
DOI:10.1021/jacs.7b05414
日期:2017.7.19
the direct functionalization of pyridines. These reactions occur under mild conditions and exhibit broad functional group tolerance, enabling the late-stage functionalization of drug-like molecules. The reagent can be easily prepared on large scale from inexpensive reagents, and reacts in the title reaction with acetonitrile, sodiumchloride, and sodium methanesulfonate as the sole byproducts. Although
A Multifunctional Reagent Designed for the Site-Selective Amination of Pyridines
作者:Patrick S. Fier、Suhong Kim、Ryan D. Cohen
DOI:10.1021/jacs.0c03537
日期:2020.5.13
We report the development of a multifunctional reagent for the direct conversion of pyridines to Boc-protected 2-aminopyridines with exquisite site selectivity and chemoselectivity. The novel reagent was prepared on 200-g scale in a single step, reacts in the title reaction under mild conditions without precautions toward air or moisture, and is tolerant of nearly all common functionality. Experimental and in situ spectroscopic monitoring techniques provide detailed insights and unexpected findings for the unique reaction mechanism.
Synthesis of dihydroindolizines for potential photoinduced work function alteration
作者:Matthew A. Bartucci、Patrycja M. Wierzbicki、Chengeto Gwengo、Sunny Shajan、Syed H. Hussain、Jacob W. Ciszek
DOI:10.1016/j.tetlet.2010.10.097
日期:2010.12
Seeking to immobilize photochromophores on metallic surfaces, we have synthesized four molecules which contain both a photoresponsive dihydroindolizine (DHI) core and a sulfur containing moiety, which allow for their assembly onto gold substrates. Sonogashira, Suzuki, or Ullmann couplings are employed to generate pyridines with pendant thioacetates (or disulfides). The pyridines are condensed with spiro[2-cyclopropene-1,9'[9H]fluorene]-2,3-dimethyl ester affording the targeted DHIs. (C) 2010 Elsevier Ltd. All rights reserved.
Robust Single-Supermolecule Switches Operating in Response to Two Different Noncovalent Interactions