FGF receptor agonist compounds corresponding to the general formula: M1-L-M2 are disclosed in which M1 and M2, which may be identical or different, each represent, independently of one another, a monomer unit M, and L represents a linker group, wherein the monomer unit is of the general formula I.
Preparation of useful building blocks, α-iodo- and bromoalkanols from cyclic ethers using the Dowex H<sup>+</sup>/NaX (X = I, Br) approach
作者:Petri A. Turhanen、Jouko J. Vepsäläinen
DOI:10.1039/c5ra20813k
日期:——
reported novel green chemistry tool was effectively used for opening cyclic ethers to produce α-iodo- and bromoalkanols. The synthesis of 4-iodobutanoic acid from γ-butyrolactone has also been described. The method is based on the use of a dried Dowex H+/NaX (X = Br, I)-system, which is effective at producing α-iodoalkanols and some α-bromoalkanols from commercially available cyclic ethers. Additionally
我们最近报告的新型绿色化学工具有效地用于开环醚以生产α-碘和溴代链烷醇。也已经描述了由γ-丁内酯合成4-碘丁酸。该方法基于使用干燥的Dowex H + / NaX(X = Br,I)系统,该系统可有效地从可商购的环状醚生产α-碘代链烷醇和某些α-溴代链烷醇。另外,证明了打开三种不同的冠醚以形成具有各种链长的α-碘(聚乙烯)二醇。卤代链烷醇是合成化学中重要的组成部分,例如用于药物化学目的。
Membrane transport. A proton-driven potassium ion pump
作者:Laurel A. Frederick、Thomas M. Fyles、Virginia A. Malik-Diemer、Dennis M. Whitfield
DOI:10.1039/c39800001211
日期:——
The functionalized crown ethers (1)–(3) act as carriers for the membranetransport of potassium ions against their concentration gradient by the coupled counter-transport of protons.
modified in various ways in the search for new functions, but few examples are known of crown ethers incorporating heterocycles in macro-ring systems. Here we report a simple and versatilesynthesis of crown ether-bearing heterocycles. An acylurea moiety in the heterocycles is efficiently transformed to 'crown ether' of various ring sizes. The products included a Ca(2+)-selective fluoroionophore. Our
Dicopper(I) trefoil knots and related unknotted molecular systems: influence of ring size and structural factors on their synthesis and electrochemical and excited-state properties
作者:Christiane O. Dietrich-Buchecker、Jean Francois Nierengarten、Jean Pierre Sauvage、Nicola Armaroli、Vincenzo Balzani、Luisa De Cola
DOI:10.1021/ja00077a024
日期:1993.12
Five new dicopper(I) knots have been synthesized as well as their face-to-face isomers. The knots range from 80- to 90-membered rings, and their preparation yields depend crucially on structural parameters such as number of methylene fragments linking the two chelating units and length of the poly(ethyleneoxy) unit used in the cyclization reaction. The best yield was obtained for an 84-membered knotted