Green synthesis of diaryl selenides from arylboronic acids and arylseleninic acids.

Synlett ◽  
2022 ◽  
Author(s):  
Sebastien Redon ◽  
Vincent Remusat ◽  
Patrice Vanelle
Keyword(s):  
Green Synthesis ◽  
Environmentally Friendly ◽  
Present Approach ◽  
New Method ◽  
Free Base ◽  
Metal Free ◽  
Arylboronic Acids

A new method of deborylative selanylation using arylboronic acids and arylseleninic acids gave diaryl selenoethers and diarylselenoxide. The present approach requires only equimolar arylseleninic acid and led selectively to selenoethers or selenoxides depending on the solvent. The method is metal-free, base- or oxidant-free, efficient, and environmentally friendly.

Metal-Free ipso-Selenocyanation of Arylboronic Acids Using Malononitrile and Selenium Dioxide

Synthesis ◽  
2019 ◽  
Vol 51 (19) ◽  
pp. 3758-3764 ◽  
Author(s):  
Sébastien Redon ◽  
Anne Roly Obah Kosso ◽  
Julie Broggi ◽  
Patrice Vanelle
Keyword(s):  
Selenium Dioxide ◽  
New Method ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Mild Conditions ◽  
Set Up

The first ipso-selenocyanation of arylboronic acids is achieved using selenium dioxide and malononitrile under mild conditions. The reaction is successful even without metal or base in DMSO. The major advantages of this new method are an easy set-up, excellent yields, and the use of odorless and inexpensive selenium reagents. Basic conditions subsequently afford new access to diaryldiselenides in good yields without isolating the organoselenocyanate intermediates.

Direct and metal-free oxidative amination of sp3 C–H bonds for the construction of 2-hetarylquinazolin-4(3H)-ones

2016 ◽  
Vol 3 (9) ◽  
pp. 1096-1099 ◽  
Author(s):  
Huanhuan Liu ◽  
Tianran Zhai ◽  
Shiteng Ding ◽  
Yalei Hou ◽  
Xiangyu Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
New Method ◽  
Oxidative Amination ◽  
Metal Free ◽  
Mild Conditions

New method for synthesis of 2-hetarylquinazolin-4(3H)-ones from 2-aminobenzamides and (2-azaaryl)methanes under transition-metal free conditions, featuring a wide substrate scope with a broad range of functional group tolerance under mild conditions.

Facile Access to Triazole-Fused 3,1-Benzoxazines Enabled by Metal-Free Base-Promoted Intramolecular C–O Coupling

Synthesis ◽  
2021 ◽  
Author(s):  
Yury N. Kotovshchikov ◽  
Stepan S. Tatevosyan ◽  
Gennadij V. Latyshev ◽  
Nikolay V. Lukashev ◽  
Irina P. Beletskaya
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
Cost Effective ◽  
Reductive Cleavage ◽  
Effective Procedure ◽  
Free Base ◽  
Metal Free ◽  
Fused Heterocycles ◽  
Convenient Approach

AbstractA convenient approach to assemble 1,2,3-triazole-fused 4H-3,1-benzoxazines has been developed. Diverse alcohol-tethered 5-iodotriazoles, readily accessible by a modified protocol of Cu-catalyzed (3+2)-cycloaddition, were utilized as precursors of the target fused heterocycles. The intramolecular C–O coupling proceeded efficiently under base-mediated transition-metal-free conditions, furnishing cyclization products in yields up to 96%. Suppression of the competing reductive cleavage of the C–I bond was achieved by the use of Na2CO3 in acetonitrile at 100 °C. This practical and cost-effective procedure features a broad substrate scope and valuable functional group tolerance.

Green synthesis of benzoimidazopyrimidine, benzimidazoloquinazolinone, triazolopyrimidine and triazoloquinazolinone derivatives catalyzed by oxalic acid dihydrate

2021 ◽  
Vol 18 ◽  
Author(s):  
Seyed Sajad Sajadikhah ◽  
Bagher Liravi-Deylami
Keyword(s):  
Oxalic Acid ◽  
Green Synthesis ◽  
Column Chromatography ◽  
Catalytic Amount ◽  
Atom Economy ◽  
One Pot ◽  
Oxalic Acid Dihydrate ◽  
Metal Free ◽  
Solvent Free Conditions ◽  
Simple Filtration

: Benzoimidazopyrimidine, benzimidazoloquinazolinone, triazolopyrimidine, and triazoloquinazolinone derivatives were synthesized via a one-pot multi-component reaction in the presence of a catalytic amount of oxalic acid dihydrate. The reactions were performed in the mixture of EtOH: H2O or under solvent-free conditions as green media. The advantageous features of these methodologies are inexpensive starting materials and catalyst, high atom economy and good yields, and metal-free synthesis. Moreover, all the products were obtained by simple filtration with no need for column chromatography or tedious separation procedures, which is very important in terms of reducing environmental pollutions.

ChemInform Abstract: Metal Free Visible Light Photoredox Activation of PhI(OAc)2for the Conversion of Arylboronic Acids to Phenols.

ChemInform ◽  
2015 ◽  
Vol 46 (33) ◽  
pp. no-no
Author(s):  
Abhijit Paul ◽  
Debnath Chatterjee ◽  
Rajkamal Rajkamal ◽  
Tanmoy Halder ◽  
Srirupa Banerjee ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Free ◽  
Arylboronic Acids

Application of the Hansen Solubility Parameters Theory to Carbon Nanotubes

2008 ◽  
Vol 8 (11) ◽  
pp. 6082-6092 ◽  
Author(s):  
S. Detriche ◽  
G. Zorzini ◽  
J.-F. Colomer ◽  
A. Fonseca ◽  
J. B. Nagy
Keyword(s):  
Carbon Nanotubes ◽  
Present Approach ◽  
New Method ◽  
Solubility Parameters ◽  
Hansen Solubility Parameters ◽  
High Solubility ◽  
New Approach ◽  
Hansen Solubility

Carbon nanotubes (CNT) are very promising nano-objects due to their exceptional properties. However, their tendency to form bundles as well as their insolubility in common solvents makes them difficult to handle. The main way to solve the problem is chemical or physical CNTs functionalisations, with all the problems inherent to the methods. In this contribution, we present a new approach that allows predicting the solubility of carbon nanotubes in many solvents but also predicting the most appropriate solvents to use for given samples of CNTs. Solubilisation and dispersion being directly connected, the present approach of solubilisation proves also to be efficient in dispersing the CNTs bundles. This contribution is a first step toward the control of carbon nanotube's dispersion in polymers and their homogenous functionalisation. Moreover, we also report here a new method, based on solvents, to separate carbon nanotubes by size, the use of mixture of non-solvents in order to obtain good solvents and the use of mixture of good solvents to obtain higher solubility. The use of mixture of good solvents allowed us to obtain high solubility, up to three times higher then that reported in literature. We have also measured and analysed the solubility of some functionalised carbon nanotubes.

Rapid Ligand-Free Base-Accelerated Copper-Catalyzed Homocoupling Reaction of Arylboronic Acids

Synlett ◽  
2016 ◽  
Vol 28 (05) ◽  
pp. 601-606 ◽  
Author(s):  
Feng Gao ◽  
Xian-Li Zhou ◽  
Ya-Nan Cao ◽  
Xin-Chuan Tian ◽  
Xing-Xiu Chen ◽  
...  
Keyword(s):  
Free Base ◽  
Arylboronic Acids ◽  
Ligand Free ◽  
Homocoupling Reaction

scholarly journals Elusive Metal-Free Primary Amination of Arylboronic Acids: Synthetic Studies and Mechanism by Density Functional Theory

2012 ◽  
Vol 134 (44) ◽  
pp. 18253-18256 ◽  
Author(s):  
Chen Zhu ◽  
Gongqiang Li ◽  
Daniel H. Ess ◽  
John R. Falck ◽  
László Kürti
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Functional Theory ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Synthetic Studies
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