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Showing 1 to 11 of 11 for “"phosphinate"”.
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Synthesis and Structural Studies of Calcium and Magnesium Phosphinate and Phosphonate Compounds
… of a wide array of magnesium and calcium based phosphinate and phosphonates with possible applications as bone scaffolding materials or additives to bone cements. The challenge to the chemistry of the alkaline earth phosphonate target compounds includes poor solubility of compounds, and poorly …
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Calorimetry and Structure-Reactivity Relationships in Hypervalent Compounds of Phosphorus and Sulfur
… acid (10), TBP 10-P-5 species, hydrolyze to diol phosphinate 11 in boiling ethanolic KOH (72 hours); this reaction is reversed by treating 11 with aqueous HCl. Under these conditions, hydrolysis of isoelectronic-isostructural 10-S-5 sulfurane oxide 2b gave n
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Preparation of arylphosphinic acid derivatives as building blocks for binding sites
… racemization. The synthesis of bisphenylalanyl phosphinates, building blocks for binding sites, is an important part in the binding site synthesis. A simple and effective preparation of methyl ester of monoarylphosphinic acids has been developed, which involves palladium catalyzed coupling of …
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Fluorinated Paramagnetic Probes for 19-F and 1-H MRS/ MRI
… di-amide cyclen ligands. Systems incorporating phosphinate pendant arms are of particular interest, resulting in complexes with favourable isomer distributions, faster longitudinal relaxation rates and narrower linewidths. Finally, the synthesis of high molecular weight conjugates with …
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Theoretical studies of thermal syn elimination reactions
… and product geometries of the ethyl formate, phosphinate, and xanthate were optimized at the RHF/6-31G* level. In addition, MP2/6-31G* energies and RHF/6-31G* electrostatic potentials were calculated. Trends in calculated activation energies and electrostatic potentials agree with experimental …
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Modifikace peptidového substrátu pro pappalysiny zavedením pseudopeptidu do štěpeného místa
… of a pseudodipeptide block containing a phosphinate moiety P(O)OH-CH2 instead of a peptide bond, which mimics the tetrahedral transition state (TS) of amide hydrolysis. By inserting the block into the cleavage site of the peptide, a potential inhibitor of pappalysins could be prepared, …
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FLUORINATED RESPONSIVE LANTHANIDE COMPLEXES FOR MAGNETIC RESONANCE
… an ortho cyano substituent. The introduction of phosphinate pendant arms allowed narrower linewidths and faster longitudinal relaxation rates to be achieved. The spectroscopic properties and the conformational isomerism of the same series of complexes have been analysed. In particular, their 19F …
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Design and synthesis of new materials for the protection, restoration, and conservation of carbonate stone artifacts of interest in the field of Cultural Heritage.
… gap, novel organophosphate, phosphonate, and phosphinate compounds were synthesized with easily scalable methods. Additionally, three ammonium oxamate derivatives: ammonium thiooxamate, N–ethyloxamate, and N–2–picolyloxamate were studied. All compounds were characterised using FT–IR, 1H, 13C, …
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Evaluation of herbicides for no-till corn establishment
… [ammonium-(3-amino-3-carboxypropyl )-methyl phosphinate], cyanazine (2-[[4-chloro-6-(ethylamino )-s-triazin-2-yl]amino]-2-methyl propionitrile)), glyphosate [N-(phosphonomethyl)glycine] and paraquat (1,1'-dimethyl 4,4'-bipyridinium ion) for the control of vegetation existing at the time of …
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Investigation of the biosynthesis of the phosphonate antibiotics bialaphos and dehydrophos
Phosphonate and phosphinate natural products possess a range of biological activities as a result of their ability to mimic phosphate esters or tetrahedral intermediates formed in enzymatic reactions involved in carboxyl group metabolism. The widespread use in medicine and agriculture of these …