Results 211 to 220 of about 18,230 (257)
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Double Couplings of Dibromothiophenes Using Boronic Acids and Boronates
Synthesis, 2008One-pot double couplings of dibromothiophenes have been investigated. Standard Suzuki couplings work well for 2,4-dibromothiophene, but are much more sensitive to steric effects in the case of 2,3-dibromothiophene. By using the recently reported potassium borates, though, good yields for both dibromothiophene isomers can be achieved.
Samantha, Varello, Scott T, Handy
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Chemical Society Reviews, 2019
Although boronic acids are recognized primarily for their utility as reagents in transition metal-catalyzed transformations, other applications are emerging, including their use as reaction catalysts.
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Although boronic acids are recognized primarily for their utility as reagents in transition metal-catalyzed transformations, other applications are emerging, including their use as reaction catalysts.
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Swapping boron acids for carbon acids
Science, 2017Organic Chemistry Carbon-bound boronic acids and their esters are widely used as coupling partners to make carbon-carbon bonds. More recently, these chemicals have garnered pharmaceutical interest in their own right. Li et al. report a versatile nickel-catalyzed process to replace carboxylic acids with boronate esters by using a phthalimide activator ...
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Australian 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
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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
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Deprotection of Pinacolyl Boronate Esters by Transesterification with Polystyrene—Boronic Acid.
ChemInform, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Thomas E. Pennington +2 more
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Boronic acids as inhibitors of steroid sulfatase
Bioorganic & Medicinal Chemistry, 2006Steroid sulfatase (STS) catalyzes the hydrolysis of steroidal sulfates such as estrone sulfate (ES1) to the corresponding steroids and inorganic sulfate. STS is considered to be a potential target for the development of therapeutics for the treatment of steroid-dependent cancers.
Vanessa, Ahmed +3 more
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2005
Preface. List of Authors. List of Abbreviations. 1 Structure, Properties, and Preparation Of Boronic Acid Derivatives. Overview of Their Reactions and Applications (D. G. Hall). 1.1 Introduction. 1.2 Structure and Properties of Boronic Acid Derivatives. 1.3 Synthesis of Boronic Acids and their Esters. 1.4 Isolation and Characterization. 1.5 Overview of
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Preface. List of Authors. List of Abbreviations. 1 Structure, Properties, and Preparation Of Boronic Acid Derivatives. Overview of Their Reactions and Applications (D. G. Hall). 1.1 Introduction. 1.2 Structure and Properties of Boronic Acid Derivatives. 1.3 Synthesis of Boronic Acids and their Esters. 1.4 Isolation and Characterization. 1.5 Overview of
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2011
Introduction: Properties, Preparation, Overview of Application Metal-Catalyzed Borylation of C-X and C-H Bonds for the Synthesis of Boronic Esters Transition-Metal Catalyzed Sila- and Diborylation of Alkenes, Allenes, and Alkynes The Contemporary Suzuki-Miyaura Reaction Rhodium and Palladium-Catalyzed Asymmetric Conjugate Additions of Organoboronic ...
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Introduction: Properties, Preparation, Overview of Application Metal-Catalyzed Borylation of C-X and C-H Bonds for the Synthesis of Boronic Esters Transition-Metal Catalyzed Sila- and Diborylation of Alkenes, Allenes, and Alkynes The Contemporary Suzuki-Miyaura Reaction Rhodium and Palladium-Catalyzed Asymmetric Conjugate Additions of Organoboronic ...
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Serum cholinesterase inhibition by boronic acid
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1984Horse serum cholinesterase (acylcholine acylhydrolase, EC 3.1.1.8) was reversibly inhibited by a variety of alkyl- and areneboronic acids with Ki values ranging from 6.2 mM (methaneboronic acid) to 3.1 microM (diphenylboric acid). Binding to the enzyme was apparently at the active center, because inhibition obeyed competitive kinetics and because ...
C W, Garner, G H, Little, J W, Pelley
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The Development of Photometric Sensors for Boronic Acids
Bioorganic Chemistry, 2001Boronic acids bind certain 1,2- and 1,3-diols with high affinity through reversible formation of boronate esters. They have been utilized as the recognition moiety for artificial receptors, particularly receptors for carbohydrates that have cis-diol moieties.
G, Springsteen +4 more
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