作者:Chiara Fabbro、Simone Armani、Laure-Elie Carloni、Federica De Leo、Johan Wouters、Davide Bonifazi
DOI:10.1002/ejoc.201402654
日期:2014.9
We describe synthetic routes for preparing previously unknown 2,5-diamide-substituted five-membered heterocycles based on the thiophene, pyrrole, and furan ring systems by exploiting Curtius-like rearrangement reactions. Conformation analysis of the 2,5-diamidothiophene derivatives identified a “closed” conformation, in which the two carbonyl O atoms are in close contact with the thiophene S atom.
我们描述了基于噻吩、吡咯和呋喃环系统通过利用类库尔蒂斯重排反应制备以前未知的 2,5-二酰胺取代的五元杂环的合成路线。2,5-二氨基噻吩衍生物的构象分析确定了一个“闭合”构象,其中两个羰基 O 原子与噻吩 S 原子紧密接触。
Selective recovery of rare earth elements using chelating ligands grafted on mesoporous surfaces
element-selective sorbents were generated through derivatisation of the diglycolamide ligand (DGA), grafted to mesoporous silica and tested for the separation of rareearth elements. It is shown that, by tuning the ligand bite angle and its environment, it is possible to improve the selectivity towards specific rareearth elements.
Cytotoxic dimers comprising CBI-based and/or CPI-based sub-units, antibody drug conjugates comprising such dimers, and to methods for using the same to treat cancer and other conditions.
Luminescent reporter compounds that are rotaxanes having the structure
where B—Z—C is a reporter molecule based on a squaraine type molecule, or similar reporter, and K is a macrocycle that encircles and interlocks with the reporter molecule. Applications of the reporter compounds are provided, as well as reactive intermediates used to synthesize the reporter compounds, and methods of synthesizing the reporter compounds.
Cation-complexing properties of synthetic macrocyclic polyether-diester ligands containing the furan, benzene, tetrahydrofuran, and thiophene subcyclic units
作者:Jerald S. Bradshaw、Steven L. Baxter、John D. Lamb、Reed M. Izatt、James J. Christensen
DOI:10.1021/ja00397a041
日期:1981.4
The synthesis of 13 new macrocyclic polyether-diester ligands containing the furan, 3,4-dimethoxyfuran, tetrahydrofuran, and thiophene subcyclic by the reaction of a diacid dichloride with the appropriate glycol is described. The complexation properties of these ligands with alkylammonium and metal cations were determined and compared with the crown ethers. The free energies of activation (..delta