scholarly journals Pseudo enantiomeric mixed S/P ligands derived from carbohydrates for the 1,4-addition of phenyl boronic acid to cyclohexenone

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 3041-3047 ◽  
Author(s):  
V. Valdivia ◽  
N. Bilbao ◽  
J. F. Moya ◽  
C. Rosales-Barrios ◽  
A. Salvador ◽  
...  
Keyword(s):  
Boronic Acid ◽  
Phenylboronic Acid ◽  
Good Catalyst ◽  
Phenyl Boronic Acid ◽  
P Ligands

Mixed S/P ligands 3 and 10, good catalyst precursors for the Rh(i)-catalysed 1,4-addition of phenylboronic acid to cyclohexenone behave as enantiomers even though both derived from d-sugars.

Copper nanoparticles supported on highly nitrogen-rich covalent organic polymers as heterogeneous catalysts for the ipso-hydroxylation of phenyl boronic acid to phenol

2020 ◽  
Vol 44 (16) ◽  
pp. 6222-6231
Author(s):  
Velu Sadhasivam ◽  
Muniyasamy Harikrishnan ◽  
Ganesan Elamathi ◽  
Rajendran Balasaravanan ◽  
Sepperumal Murugesan ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Heterogeneous Catalyst ◽  
Copper Nanoparticles ◽  
Boronic Acid ◽  
Heterogeneous Catalysts ◽  
Phenylboronic Acid ◽  
Organic Polymers ◽  
Atmospheric Conditions ◽  
Phenyl Boronic Acid

Here, we report the synthesis of highly nitrogen-rich covalent organic polymers as a solid heterogeneous catalyst for the oxidation of phenylboronic acid under atmospheric conditions in an aqueous medium to achieve very good yields up to 99%.

Arylboronic Acids in Self-condensation of Glucosamines Forming Deoxyfructosazine, Catalysts or Reagents?

2019 ◽  
Author(s):  
Meifeng Wang ◽  
Gan Zhu ◽  
Yiqun Li ◽  
Liuqun Gu
Keyword(s):  
Molecular Recognition ◽  
Boric Acid ◽  
Boronic Acid ◽  
Catalytic Mechanism ◽  
Organic Transformations ◽  
Food Industries ◽  
Arylboronic Acids ◽  
Excess Amount ◽  
Phenyl Boronic Acid ◽  
Boron Acid

Arylboronic acids were widely used as efficient catalysts in direct amide formation and other organic transformations. Surprisingly, reports on their use as catalysts in carbohydrates synthesis are very rare even though boron acid-diol complexation was extensively investigated in molecular recognition for saccharides and so on. Here we developed an efficient arylboronic acids catalyzed dimerization of glucosamines forming deoxyfructosazine which is important compound in pharmaceutical and food industries, against a commonly held belief that excess amount of phenyl boronic acid (or boric acid) is a must. A catalytic mechanism was also proposed and arylboronic acids instead of their boronates was identified as catalysts.

scholarly journals Analysis of glycoproteins by SDS-PAGE with methacrylamido phenyl boronic acid

2014 ◽  
Vol 58 (2) ◽  
pp. 33-35 ◽  
Author(s):  
Yuichi Aikyo ◽  
Masamichi Oh-Ishi
Keyword(s):  
Boronic Acid ◽  
Sds Page ◽  
Phenyl Boronic Acid

scholarly journals Adsorption and Release of Rose Bengal on Layer-by-Layer Films of Poly(Vinyl Alcohol) and Poly(Amidoamine) Dendrimers Bearing 4-Carboxyphenylboronic Acid

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1854 ◽  
Author(s):  
Kentaro Yoshida ◽  
Akane Yamaguchi ◽  
Hiroki Midorikawa ◽  
Toshio Kamijo ◽  
Tetsuya Ono ◽  
...  
Keyword(s):  
Rose Bengal ◽  
Boronic Acid ◽  
Vinyl Alcohol ◽  
Acidic Solution ◽  
Phenylboronic Acid ◽  
Poly Vinyl Alcohol ◽  
Basic Solution ◽  
Layer By Layer ◽  
Lbl Films ◽  
H2o2 Solution

Phenylboronic acid-bearing polyamidoamine dendrimer (PBA-PAMAM)/poly(vinyl alcohol) (PVA) multilayer films were prepared through the layer-by-layer (LbL) deposition of PBA-PAMAM solution and PVA solution. PBA-PAMAM/PVA films were constructed successfully through the formation of boronate ester bonds between the boronic acid moiety in PBA and 1,3-diol units in PVA. When the (PBA-PAMAM/PVA)5 films were immersed in rose bengal (RB) solution, RB was adsorbed onto the LbL films. The amount of RB adsorbed was higher in the LbL films immersed in acidic solution than in basic solution. The release of RB from the LbL films was also promoted in the basic solution, while it was suppressed in the acidic solution. The boronic acid ester is oxidized to phenol by hydrogen peroxide (H2O2) and the carbon-boron bond is cleaved, so that the (PBA-PAMAM/PVA)5 films can be decomposed by immersion in H2O2 solution. Therefore, when RB-adsorbed (PBA-PAMAM/PVA)5 films were immersed in H2O2 solution, the release of RB was moderately promoted when the solution was weakly acidic.

scholarly journals Discovery of 2-[5-(4-Fluorophenylcarbamoyl)pyridin-2-ylsulfanylmethyl]phenylboronic Acid (SX-517): Noncompetitive Boronic Acid Antagonist of CXCR1 and CXCR2

2014 ◽  
Vol 57 (20) ◽  
pp. 8378-8397 ◽  
Author(s):  
Dean Y. Maeda ◽  
Angela M. Peck ◽  
Aaron D. Schuler ◽  
Mark T. Quinn ◽  
Liliya N. Kirpotina ◽  
...  
Keyword(s):  
Boronic Acid ◽  
Phenylboronic Acid ◽  
Acid Antagonist

On the sensitivity of alginate rheology to composition

Soft Matter ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Karthika Suresh ◽  
Marleen Häring ◽  
Guruswamy Kumaraswamy ◽  
David Díaz Díaz
Keyword(s):  
Viscoelastic Fluid ◽  
Boronic Acid ◽  
Linear Response ◽  
High Strain ◽  
Strain Behaviour ◽  
Phenyl Boronic Acid ◽  
Universal Composition

The linear response of alginate-phenyl boronic acid (Alg-PBA) esters shows a universal, composition-independent viscoelastic fluid-like behaviour. However, their high strain behaviour is very sensitive to composition.

scholarly journals Iron Pincer Complexes as Catalysts in Cross-coupling of Aryl Halides and Phenylboronic Acid

2018 ◽  
Vol 7 (4.5) ◽  
pp. 428
Author(s):  
Lolakshi Mahesh Kumar ◽  
Badekai Ramachandra Bhat
Keyword(s):  
Phenylboronic Acid ◽  
Coupling Efficiency ◽  
Cross Coupling ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Alternative Approach ◽  
Active Metal ◽  
Phenyl Boronic Acid ◽  
Pcp Complexes ◽  
Coupling Yield

Pincer complexes with iron as active metal center were synthesized to study their catalytic activity in Suzuki-Miyaura coupling reactions. Tridentate pincer ligand was synthesized by the reaction of diphenylchlorophosphine with m-aminophenol and m-phenylenediamine respectively in a 2:1 ratio in the presence of triethylamine as a base and tetrahydrofuran as solvent media. The resultant ligand was complexed with FeSO4 to obtain PCP complexes, C-1 with O and N atoms in the side arms and C-2 with both N atoms in the side arms. The synthesized complexes were examined for their C-C coupling efficiency in cross-coupling between phenyl boronic acid and para substituted halobenzenes. The research study aims to provide an alternative approach to the Pd catalyzed cross coupling methods, an otherwise subjugated method to obtain cross-coupled products. Also the study implores on the effect of variation in the side arm atom relating to the donating ability of the ligand and thereby relatively affecting the coupling yield of the catalysts.  

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