Results 11 to 20 of about 834,274 (293)

CuI-Zeolite Catalysis for Biaryl Synthesis via Homocoupling Reactions of Phenols or Aryl Boronic Acids [PDF]

open access: yesMolecules
Due to the importance of biaryls as natural products, drugs, agrochemicals, dyes, or organic electronic materials, a green alternative biaryl synthesis has been developed based on easy-to-prepare and cheap copper(I)-exchanged zeolite catalysts.
Xiaohui Di   +7 more
doaj   +2 more sources

Acidity Constants of Boronic Acids as Simply as Possible: Experimental, Correlations, and Prediction [PDF]

open access: yesMolecules
The wide use of boronic compounds, especially boronic acids and benzoxaboroles, in virtually all fields of chemistry is related to their specific properties. The most important of them are the ability to form cyclic esters with diols and the complexation
Andrzej Sporzyński   +5 more
doaj   +2 more sources

Iodinolysis of boronic acids

open access: yesAustralian Journal of Chemistry, 1965
The relative rates of iodinolysis of benzene-, thiophen-2-, and thiophen-3-boronic acids at 25° were found to be 1 : 700 : 104, or for thiophen-2- and thiophen-3-boronic acid 14 : 1. These values correlate reasonably well with data on protodetrimethylsilylation, and may be satisfactorily understood in terms of current molecular orbital theory.
RD Brown, AS Buchanan, AA Humffray
openaire   +2 more sources

Structural Requirements of 1-(2-Pyridinyl)-5-pyrazolones for Disproportionation of Boronic Acids [PDF]

open access: yesMolecules, 2021
We observed an unusual formation of four-coordinate boron(III) complexes from the reaction of 1-(2-pyridinyl)-5-pyrazolone derivatives with arylboronic acids in the basic media.
Joungmo Cho   +5 more
doaj   +2 more sources

Click Reactions and Boronic Acids: Applications, Issues, and Potential Solutions

open access: yesMolecules, 2010
Boronic acids have been widely used in a wide range of organic reactions, in the preparation of sensors for carbohydrates, and as potential pharmaceutical agents.
Chaofeng Dai   +3 more
doaj   +3 more sources

A Lewis Base Catalysis Approach for the Photoredox Activation of Boronic Acids and Esters [PDF]

open access: yesAngewandte Chemie - International Edition, 2017
We report herein the use of a dual catalytic system comprising of a Lewis base catalyst such as quinuclidin-3-ol or 4- dimethylaminopyridine combined with a photoredox catalyst to generate carbon radicals from either boronic acids or esters.
Erik van der Eycken   +2 more
exaly   +3 more sources

Cu-catalyzed decarboxylative coupling of propiolic acids with boronic acids

open access: yesTetrahedron Letters, 2013
A mild procedure of Cu-catalyzed decarboxylative cross-coupling of aryl- and alkynyl-boronic acids for construction of unsymmetrical substituted alkynes has been developed. The usage of inexpensive copper chloride as catalyst, and employing stable alkynl
Xun Li, Ning Jiao
exaly   +2 more sources

Which boronic acids are used most frequently for synthesis of bioactive molecules ? [PDF]

open access: yes, 2023
Boronic acids are essential building blocks used for the synthesis of bioactive molecules, the generation of chemical libraries and the exploration of structure-activity relationships.
Odile, Decoret   +3 more
core   +1 more source

Applications of the Reversible Boronic Acids/Boronate Switch to Nucleic Acids

open access: yesThe Chemical Record, 2022
AbstractOver the last decades, boron and nucleic acids chemistries have gained a lot of attention for biological, medicinal and analytical applications. Our laboratory has a long‐standing interest in both chemistries and owing to the ability of boronic acids to react with cis‐diol function in aqueous media we developed over the years a variety of ...
Mégane Debiais   +2 more
openaire   +2 more sources

Photocatalytic direct borylation of carboxylic acids

open access: yesNature Communications, 2022
Boronic acids are useful reagents in organic synthesis and thus methods to prepare these compounds under mild conditions are desirable. Here, the authors synthesize boronic acids via photocatalytic decarboxylation of benzoic acids followed by borylation;
Qiang Wei   +8 more
doaj   +1 more source

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