50638-46-5Relevant academic research and scientific papers
Potential Foldamers Based on an ortho-Terphenyl Amino Acid
Kleman, Adam F.,Dufek, Deseree L.,Fobe, Theodore L.,McCaslin, Darrell R.,Cary, Brian P.,Shirts, Michael R.,Gellman, Samuel H.
supporting information, p. 4855 - 4859 (2021/06/28)
We describe the synthesis and characterization of a new class of oligomers built from a terphenyl-based amino acid. These oligomeric amides are of interest because the adoption of specific conformations could potentially be driven by the coordinated formation of inter-residue hydrogen bonds and aromatic interactions. Although high-resolution structural data have proven inaccessible, circular dichroism and nuclear magnetic resonance studies suggest that the new oligomers fold concomitantly with discrete self-association in chloroform.
COMPOUNDS AND COMPOSITIONS FOR THE TREATMENT OF PARASITIC DISEASES
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Paragraph 0674-0676, (2021/04/23)
The present invention provides a compound of formula (Ia) or a pharmaceutically acceptable salt thereof; a method for manufacturing the compounds of the invention, solid forms, combinations of pharmacologically active agents, pharmaceutical compositions and methods of using such compounds and solid forms thereof to treat or prevent parasitic diseases, for example malaria.
Transition-metal-free decarboxylative bromination of aromatic carboxylic acids
Quibell, Jacob M.,Perry, Gregory J. P.,Cannas, Diego M.,Larrosa, Igor
, p. 3860 - 3865 (2018/04/26)
Methods for the conversion of aliphatic acids to alkyl halides have progressed significantly over the past century, however, the analogous decarboxylative bromination of aromatic acids has remained a longstanding challenge. The development of efficient methods for the synthesis of aryl bromides is of great importance as they are versatile reagents in synthesis and are present in many functional molecules. Herein we report a transition metal-free decarboxylative bromination of aromatic acids. The reaction is applicable to many electron-rich aromatic and heteroaromatic acids which have previously proved poor substrates for Hunsdiecker-type reactions. In addition, our preliminary mechanistic study suggests that radical intermediates are not involved in this reaction, which is in contrast to classical Hunsdiecker-type reactivity. Overall, the process demonstrates a useful method for producing valuable reagents from inexpensive and abundant starting materials.
Mechanistic study on iodine-catalyzed aromatic bromination of aryl ethers by N-Bromosuccinimide
Pramanick, Pranab Kumar,Hou, Zhen-Lin,Yao, Bo
, p. 7105 - 7114 (2017/11/27)
Although iodine-catalyzed reaction has rapid advances in recent years, examples on iodine-catalyzed bromination are rare and the mechanism of these reactions remains unclear. Herein, we reported an I2-catalyzed aromatic bromination of aryl ethers by NBS and presented the details of the mechanistic study including kinetic study and the study of kinetic isotope effects. The study revealed that the reaction was actually catalyzed by IBr formed in the induction period, and the rate-determining step was the HBr-elimination of the Wheland intermediate assisted by IBr.
Poly(4-vinylpyridinium bromochromate): An efficient reagent for bromination of aromatic compounds
Albadi, Jalal,Tajik, Hassan,Keshavarz, Mosadegh,Abedini, Masoumeh
, p. 179 - 181 (2013/07/27)
A simple and efficient method for the bromination of various aromatic compounds by using poly(4-vinylpyridinium bromochromate) is reported. This method has several advantages such as good selectivity between ortho and para positions of aromatic compounds, simple workup, short reaction times, and high yields of the products.
Simple and improved regioselective brominations of aromatic compounds using N-benzyl-N,N-dimethylanilinium peroxodisulfate in the presence of potassium bromide under mild reactions conditions
Ghasemnejad-Bosra, Hassan,Ramzanian-Lehmali, Farhad,Jafari, Somaye
experimental part, p. 685 - 692 (2012/01/16)
A simple, efficient, and mild method for the selective bromination of some activated aromatic compounds using N-benzyl-N,N-dimethylanilinium peroxodisulfate in the presence of potassium bromide in non-aqueous solution is reported. The results obtained revealed good to excellent selectivity between the ortho and para positions of phenols and methoxyarenes.
Bromination of some aromatic compounds with potassium bromide in the presence of benzyltriphenylphosphonium peroxodisulfate
Tajik, Hassan,Mohammadpoor-Baltork, Iraj,Albadi, Jalal
, p. 323 - 328 (2007/10/03)
A simple, efficient, and mild method for selective bromination of some activated aromatic compounds using potassium bromide in the presence of benzyltriphenylphosphonium peroxodisulfate in nonaqueous solution is reported. The results obtained revealed good to excellent selectivity between ortho and para positions of phenols and methoxyarenes. Copyright Taylor & Francis Group, LLC.
NOVEL 3-(2-AMINO-4-PYRIMIDINYL)-4-HYDROXYPHENYL KETONE DERIVATIVES
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Page 44, (2010/02/08)
The present invention relates to novel compounds having 3-(2-amino-4-pyrimidinyl)-4-hydroxyphenyl ketone structure, as being illustrated in Formula 1, for inhibition of angiogenesis receptor tyrosine kinases, in particular, VEGF receptor 2 kinase ("KDR")
107. Substitution electrophile aromatique dans l'anhydride sulfureux liquide. Etude cinetique de la reaction de bromination d'anisoles monosubstitues. Transmission des effets electroniques et caracteristiques de l'etat de transition
Castellonese, Paul,Villa, Pierre
, p. 1068 - 1077 (2007/10/02)
Reactivity-structure correlations for anisole and eleven of its substituted derivatives established from bromination rate constants in liquid SO2, unlike observations in water, show the reaction to be highly sensitive to substituent effects, (ρ+H2O = -7.1; ρ+SO2 = -10.51).This result is ascribed to the solvation of the methoxy group which decreases the conjugation of para-substituted (ρ+O = -9.70) compared to that of ortho-substituted derivatives (ρ+p = -8.86).The highly solvated transition state lies far from reactants on the reaction coordinate and the positive charge developed in this state is nearly unity.
