Synthesis of Multitopic Verdazyl Radical Ligands. Paramagnetic Supramolecular Synthons
摘要:
The syntheses of several verdazyl radical and diradicals containing pyridine-based multitopic coordination sites are described. These compounds were designed to be paramagnetic analogues of oligopyridine metallosupramolecular building blocks.
Synthesis of Multitopic Verdazyl Radical Ligands. Paramagnetic Supramolecular Synthons
摘要:
The syntheses of several verdazyl radical and diradicals containing pyridine-based multitopic coordination sites are described. These compounds were designed to be paramagnetic analogues of oligopyridine metallosupramolecular building blocks.
The Stabilization Effect of π‐Backdonation Ligands on the Catalytic Reactivities of Amido‐Ene(amido) Iron Catalysts in the Asymmetric Transfer Hydrogenation of Ketones
Further electronic studies on 1a, 1b and 2a revealed that the π‐backdonation interactions in 1a and 1b can delocalize the electron density on the iron centers to the π‐bound ligand, explaining the elevated stability of the ene(amido)‐containing catalytic intermediates. Dearomatized pyridyl iron complexes (3b) were also inactive because they were too basic to be stable in the reaction solution.
COMPACT HYDROXAMATE-BASED AFFINITY TAGS FOR ARTIFICIALLY TAGGING BIOLOGICAL MACROMOLECULES
申请人:The Board of Trustees of the Leland Stanford Junior University
公开号:US20220054955A1
公开(公告)日:2022-02-24
Methods for purifying biological macromolecules are provided. Aspects of the subject methods include contacting the biological macromolecule with an exemplary hydroxamate affinity tag to produce a tagged moiety followed by purification of the tagged moiety by immobilized metal affinity chromatography (IMAC). Also provided are kits comprising an exemplary subject hydroxamate affinity tag, an IMAC resin and a metal ion configured for loading onto the resin, wherein the metal ion is capable of binding to a compound containing the hydroxamate affinity tag.
Controlling chirality in the synthesis of 4 + 4 diastereomeric amine macrocycles derived from <i>trans</i>-1,2-diaminocyclopentane and 2,6-diformylpyridine
chirality have been designed and synthesized to enable controlled and efficient synthesis of all six possible diastereomers of 4 + 4 macrocyclic amine derived from trans-1,2-diaminocyclopentane (DACP) and 2,6-diformypyridine (DFP) units. Although two out of six diastereomers have been reported recently, their synthesis presented here is more direct and occurs with an improved yield. This family of
A New Synthetic Strategy Leading to Homochiral Macrocycles Derived from 2,6‐Diformylpyridine and (1
<i>S</i>
,2
<i>S</i>
)‐
<i>trans</i>
‐1,2‐Diaminocyclopentane
extended primary diamine [comprising two (SS)‐DACP and one DFP moieties] followed by reduction delivers a mixture of even‐number macrocyclic amines where a dominant product is the 4+4 macrocycle. The 4+4 and 6+6 macrocycles have been isolated by GPC.
[EN] COMPACT HYDROXAMATE-BASED AFFINITY TAGS FOR ARTIFICIALLY TAGGING BIOLOGICAL MACROMOLECULES<br/>[FR] MARQUEURS D'AFFINITÉ À BASE D'HYDROXAMATE COMPACT POUR LE MARQUAGE ARTIFICIEL DE MACROMOLÉCULES BIOLOGIQUES
申请人:UNIV LELAND STANFORD JUNIOR
公开号:WO2020154541A1
公开(公告)日:2020-07-30
Methods for purifying biological macromolecules are provided. Aspects of the subject methods include contacting the biological macromolecule with an exemplary hydroxamate affinity tag to produce a tagged moiety followed by purification of the tagged moiety by immobilized metal affinity chromatography (IMAC). Also provided are kits comprising an exemplary subject hydroxamate affinity tag, an IMAC resin and a metal ion configured for loading onto the resin, wherein the metal ion is capable of binding to a compound containing the hydroxamate affinity tag.