scholarly journals A Novel Ternary Ligand System Useful for Preparation of Cationic99mTc-Diazenido Complexes and99mTc-Labeling of Small Biomolecules

2006 ◽  
Vol 17 (2) ◽  
pp. 473-484 ◽  
Author(s):  
Young-Seung Kim ◽  
Zhengjie He ◽  
Wen-Yuan Hsieh ◽  
Shuang Liu
Keyword(s):  
Ligand System ◽  
Small Biomolecules

Synthesis, Structure and Reactivities of Pentacoordinated Phosphorus–Boron Bonded Compounds

2020 ◽  
Author(s):  
Nathan O'Brien ◽  
Naokazu Kano ◽  
Nizam Havare ◽  
Ryohei Uematsu ◽  
Romain Ramozzi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ring Expansion ◽  
Bicyclic Compound ◽  
Compound A ◽  
Ligand System ◽  
Large Bulk ◽  
Rearrangement Reaction ◽  
Hydride Abstraction ◽  
Pentacoordinated Phosphorus ◽  
Acids And Bases

<div>The isolation and reactivities of two pentacoordinated phosphorus–tetracoordinated boron bonded compounds were</div><div>explored. A strong Lewis acidic boron reagent and electron-withdrawing ligand system were required to form the</div><div>pentacoordinated phosphorus state of the P–B bond. The first compound, a phosphoranyl-trihydroborate, gave a THF</div><div>stabilised phosphoranyl-borane intermediate upon a single hydride abstraction in THF. This compound could undergo a</div><div>unique rearrangement reaction, that involved a two-fold ring expansion, to give an unusual fused bicyclic compound or it</div><div>could act as a mono-hydroboration reagent. The hydroboration reactivity of the intermediate was found to be more reactive</div><div>towards alkynes over alkenes with good to moderate regioselectivity towards the terminal carbon. The second compound,</div><div>a phosphoranyl-triarylborate, was found to have a vastly different reactivity to the trihydroborate as it was highly stable</div><div>towards acids and bases. This is thought to be due to the large bulk around the P–B bond as shown in the crystal structure</div>

Synthetic models for bis-metallo active sites. A porphyrin capped by a tetrakis(pyridine) ligand system

1978 ◽  
Vol 100 (9) ◽  
pp. 2899-2901 ◽  
Author(s):  
David A. Buckingham ◽  
Maxwell J. Gunter ◽  
Lewis N. Mander
Keyword(s):  
Active Sites ◽  
Pyridine Ligand ◽  
Ligand System ◽  
Synthetic Models

Corphin, a Corrinoid-Porphinoid Ligand System

1968 ◽  
Vol 7 (8) ◽  
pp. 623-625 ◽  
Author(s):  
A. P. Johnson ◽  
P. Wehrli ◽  
R. Fletcher ◽  
A. Eschenmoser
Keyword(s):  
Ligand System

Opioid receptor affinity of multivalent ligand system consisting of polymerized liposome

2009 ◽  
Vol 48 (1) ◽  
pp. 95-101 ◽  
Author(s):  
SHOKO TETSUI ◽  
JINBAO ZHAO ◽  
SHUNSAKU KIMURA ◽  
YUKIO IMANISHI
Keyword(s):  
Opioid Receptor ◽  
Receptor Affinity ◽  
Ligand System

On the Origins of Core−Electron Chemical Shifts of Small Biomolecules in Aqueous Solution: Insights from Photoemission andab InitioCalculations of Glycineaq

2011 ◽  
Vol 133 (9) ◽  
pp. 3120-3130 ◽  
Author(s):  
Niklas Ottosson ◽  
Knut J. Børve ◽  
Daniel Spångberg ◽  
Henrik Bergersen ◽  
Leif J. Sæthre ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chemical Shifts ◽  
Core Electron ◽  
Small Biomolecules
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