Ullmann Type N-Arylation Reactions of Iodo Pyrazoles with Phenyl Boronic Acid in Cu2O Catalyst
نویسندگان
چکیده
منابع مشابه
Transition-Metal-Free N-Arylation of Pyrazoles with Diaryliodonium Salts.
A new synthetic method was developed for the N-arylation of pyrazoles using diaryliodonium salts. The transformation does not require any transition-metal catalyst and provides the desired N-arylpyrazoles rapidly under mild reaction condition in the presence of aqueous ammonia solution as a mild base without the use of inert atmosphere. The chemoselectivity of unsymmetric diaryliodonium salts w...
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Cumulative formation constants for the interaction of phenylboronic acids with 1,2-diols and structurally related α-hydroxy carboxylic acids were determined by potentiometric titration in aqueous solution. Although there is a significant electronic effect on the acidity of phenylboronic acid (ρ = 2.1), there is no marked electronic effect on the stability of the complexes. Rather, the complexes...
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An Ullmann-type coupling reaction was employed for the preparation of several N-arylated monopyrrolotetrathiafulvalenes with variable substitution patterns. Spectroscopic and electrochemical properties of the coupling products strongly depend on the electronic nature of the aromatic substituents due to their direct conjugation with the tetrathiafulvalene chromophore. The crystal packing of the ...
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ژورنال
عنوان ژورنال: Aksaray University Journal of Science and Engineering
سال: 2019
ISSN: 2587-1277
DOI: 10.29002/asujse.475842