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Melting Point: 96-98 ºCBoiling Point: 194 ºC (70 mmHg)

Mn(II), Co(II), Ni(II), Cu(II), Zn(II), and Pd(II) complexes of the Schiff base 2-(6-methoxybenzothiazol-2-ylimino)methyl)-4-nitrophenol coordinated to the metal ions via the imine nitrogen and phenol oxygen atoms respectively. The electronic spectra measurement was corroborative of a 4-coordinate tetrahedral/square planar geometry for the complexes. The complexes exhibited good in-vitro antibacterial activities against S. aureus, E. coli and P. mirablilis , while Pd(II) and Zn(II) complexes had broad spectrum anti-bacteria activity against all the bacteria used with the exception of B. subtilis proving their potentials as broad-spectrum antibacterial agents.

AIP Conference Proceedings, Volume 1447, Issue 1, p.519-520 ()Single crystals of L-Phenylalanine-4-nitrophenol (LPNP) were synthesisand grown by slow cooling solution growth technique.

T1 - Synthesis, relaxometric and photophysical properties of a new pH-responsive MRI contrast agent

(preparation of active esters for peptide synthesis)

AB - Two gadolinium(III) chelates, GdNP-DO3A (1-methlyene-(p-NitroPhenol)-1,4,7, 10-tetraazacycloDOdecane-4,7,10-triAcetate) and GdNP-DO3AM (1-methlyene(p- NitroPhenol)-1,4,7,10-tetraazacycloDOdecane-4,7,10-triacetAMide), containing a single nitrophenolic pendant arm plus either three acetate or three amide pendant arms were synthesized and characterized. The properties of the gadolinium, terbium, and dysprosium complexes of these ligands were examined as a function of pH. The extent and mechanism of the changes in water relaxivity with pH of each gadolinium complex was found to differ substantially for the two complexes. The water relaxivity of Gd(NP-DO3A) increases from 4.1 mM -1 s-1 at pH 9 to 7.0 mM-1 s-1 at pH 5 as a result of acid-catalyzed dissociation of the nitrophenol from the lanthanide. The nitrophenol group in Gd(NP-DO3AM) does not dissociate from the metal center even at pH 5; therefore, the very modest increase in relaxivity in this complex must be ascribed to an increase in prototropic exchange rate of the bound water and/or phenolic protons.

N2 - Two gadolinium(III) chelates, GdNP-DO3A (1-methlyene-(p-NitroPhenol)-1,4,7, 10-tetraazacycloDOdecane-4,7,10-triAcetate) and GdNP-DO3AM (1-methlyene(p- NitroPhenol)-1,4,7,10-tetraazacycloDOdecane-4,7,10-triacetAMide), containing a single nitrophenolic pendant arm plus either three acetate or three amide pendant arms were synthesized and characterized. The properties of the gadolinium, terbium, and dysprosium complexes of these ligands were examined as a function of pH. The extent and mechanism of the changes in water relaxivity with pH of each gadolinium complex was found to differ substantially for the two complexes. The water relaxivity of Gd(NP-DO3A) increases from 4.1 mM -1 s-1 at pH 9 to 7.0 mM-1 s-1 at pH 5 as a result of acid-catalyzed dissociation of the nitrophenol from the lanthanide. The nitrophenol group in Gd(NP-DO3AM) does not dissociate from the metal center even at pH 5; therefore, the very modest increase in relaxivity in this complex must be ascribed to an increase in prototropic exchange rate of the bound water and/or phenolic protons.

Synthesis of p-aminophenol from p-nitrophenol over …

Percentage manganese, cobalt, nickel, copper, zinc and palladium in the complexes were determined titrimetrically [].
Infrared spectra were measured in deuterated dimethyl sulfoxide solvent on a Shimadzu FTIR-8400 spectrophotometer while
electronic spectra in chloroform were recorded on Unicam Helios -γ spectrophotometer, and melting points (uncorrected) were done
using a Stuart scientific melting point apparatus smp3.

Two gadolinium(III) chelates, GdNP-DO3A (1-methlyene-(p-NitroPhenol)-1,4,7, 10-tetraazacycloDOdecane-4,7,10-triAcetate) and GdNP-DO3AM (1-methlyene(p- NitroPhenol)-1,4,7,10-tetraazacycloDOdecane-4,7,10-triacetAMide), containing a single nitrophenolic pendant arm plus either three acetate or three amide pendant arms were synthesized and characterized. The properties of the gadolinium, terbium, and dysprosium complexes of these ligands were examined as a function of pH. The extent and mechanism of the changes in water relaxivity with pH of each gadolinium complex was found to differ substantially for the two complexes. The water relaxivity of Gd(NP-DO3A) increases from 4.1 mM -1 s-1 at pH 9 to 7.0 mM-1 s-1 at pH 5 as a result of acid-catalyzed dissociation of the nitrophenol from the lanthanide. The nitrophenol group in Gd(NP-DO3AM) does not dissociate from the metal center even at pH 5; therefore, the very modest increase in relaxivity in this complex must be ascribed to an increase in prototropic exchange rate of the bound water and/or phenolic protons.

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Synthesis of 2-methyl-4-nitrophenol from benzene


There are a lot of ways to pull this synthesis together, ..

Therefore, we are reporting the synthesis and characterization of metal (II) complexes of the Schiff base, of 2-(6-methoxybenzothiazol-2-ylimino)methyl)-4-nitrophenol for the first time as a continuation of the research activities of our group [-].The aims of this study is to investigation the physicochemical properties of these metal complexes as well as their potency as in-vitro antibacterial agents

Synthesis of p-nitrophenol under normal pressure with …

-Nitrophenyl esters, prepared by -mediated coupling between -protected amino acids and -nitrophenol, are among the most useful activated esters for peptide synthesis (eq 1). They are readily purified by recrystallization, often from alcoholic solvents with which they do not react. Aminolysis occurs at a reasonable rate, generally at room temperature without a catalyst. The -nitrophenol generated as a byproduct in this step is easily removed. -Nitrophenyl esters can be used similarly (see ); a study of the rates of aminolysis of Boc-L-leucine nitrophenyl esters showed the -isomer to react 4-9 times faster than the -isomer.

Sciencemadness Discussion Board - P-Nitrophenol - …

some end products derived from mononitrophenols include dyes and pigments, acetaminophen (from p-aminophenol), carbofuran, phosalon (insecticides form o-nitrophenol), parathion,parathion-methyl, fluorodifen (insecticides form p-nitrophenol), nitrofen, bifenox (herbicides form p-nitrophenol), fungicides, and rubber chemicals.

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