Metal-free synthesis of imidazopyridine from nitroalkene and 2-aminopyridine in the presence of a catalytic amount of iodine and aqueous hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9591-9593 ◽  
Author(s):  
Yuma Tachikawa ◽  
Yoshitomo Nagasawa ◽  
Sohei Furuhashi ◽  
Lei Cui ◽  
Eiji Yamaguchi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Amount ◽  
Synthetic Method ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free

We have developed a metal-free synthetic method for 3-nitroimidazo[1,2-a]pyridines from nitroalkenes and 2-aminopyridines using catalytic amounts of iodine and aqueous hydrogen peroxide as a terminal oxidant.

ChemInform Abstract: Metal-Free Synthesis of Imidazopyridine from Nitroalkene and 2-Aminopyridine in the Presence of a Catalytic Amount of Iodine and Aqueous Hydrogen Peroxide.

ChemInform ◽  
2015 ◽  
Vol 46 (26) ◽  
pp. no-no
Author(s):  
Yuma Tachikawa ◽  
Yoshitomo Nagasawa ◽  
Sohei Furuhashi ◽  
Lei Cui ◽  
Eiji Yamaguchi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Amount ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free

Kinetics of the oxidation of dimethyl sulfoxide with aqueous hydrogen peroxide catalyzed by sodium tungstate

1981 ◽  
Vol 59 (4) ◽  
pp. 718-722 ◽  
Author(s):  
Yoshiro Ogata ◽  
Kazushige Tanaka
Keyword(s):  
Hydrogen Peroxide ◽  
Dimethyl Sulfoxide ◽  
Sodium Tungstate ◽  
Catalytic Amount ◽  
Active Oxygen ◽  
Probable Mechanism ◽  
Polarographic Study ◽  
Aqueous Hydrogen Peroxide ◽  
First Order ◽  
Kinetics Of

The oxidation of dimethyl sulfoxide (DMSO) by hydrogen peroxide in the presence of a catalytic amount of sodium tungstate (Na2WO4) has been studied kinetically by means of iodometry of hydrogen peroxide. The reaction is first-order with respect to the substrate and the catalyst, but independent of the concentration of hydrogen peroxide which is present in excess of the catalyst. The polarographic study implies that in solutions two main kinds of peroxytungstic acids (H2WO5 and H2WO8) are formed which contain active oxygen in ratios (active oxygen):(Na2WO4) of 1:1 and 4:1, respectively. The effect of acidity on the oxidation rate and a probable mechanism involving a rate-determining attack of peroxytungstic acids are discussed.

Metal-free oxidative amidation of aldehydes with aminopyridines employing aqueous hydrogen peroxide

2016 ◽  
Vol 14 (35) ◽  
pp. 8228-8231 ◽  
Author(s):  
E. Sankari Devi ◽  
Anitha Alanthadka ◽  
A. Tamilselvi ◽  
Subbiah Nagarajan ◽  
Vellaisamy Sridharan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free ◽  
Oxidative Amidation

An elegant metal free method for the amidation of aldehydes with aminopyridines for the synthesis of N-(pyridinyl)benzamide was accomplished using simple aqueous H2O2 as the oxidant.

Magnetic nanoparticle-supported imidazole tribromide: a green, mild, recyclable and metal-free catalyst for the oxidation of sulfides to sulfoxides in the presence of aqueous hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53749-53756 ◽  
Author(s):  
Somayeh Otokesh ◽  
Eskandar Kolvari ◽  
Ali Amoozadeh ◽  
Nadiya Koukabi
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Peroxide ◽  
Transmission Electron Microscopy ◽  
Magnetic Nanoparticles ◽  
Magnetic Nanoparticle ◽  
Vibrating Sample Magnetometer ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free ◽  
Transmission Electron ◽  
Ft Ir

Imidazole tribromide immobilized on magnetic nanoparticles as a bromine source was prepared and characterized by XRD, TGA, FT-IR, EDS, scanning and transmission electron microscopy, and vibrating sample magnetometer techniques.

ChemInform Abstract: Metal-Free Oxidative Amidation of Aldehydes with Aminopyridines Employing Aqueous Hydrogen Peroxide.

ChemInform ◽  
2016 ◽  
Vol 47 (52) ◽  
Author(s):  
E. Sankari Devi ◽  
Anitha Alanthadka ◽  
A. Tamilselvi ◽  
Subbiah Nagarajan ◽  
Vellaisamy Sridharan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free ◽  
Oxidative Amidation

A Facile Synthesis of 2-Aminobenzoxazines Based on Iodine­Catalyzed Desulfurative Cyclization

Synthesis ◽  
2021 ◽  
Author(s):  
Shinji Tanimori ◽  
Asuka Fuchiya ◽  
Takuya Miyamura ◽  
Haruna Nariki ◽  
Shizuki Noda ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Transition Metal ◽  
Room Temperature ◽  
Catalytic Amount ◽  
Molecular Iodine ◽  
Environmentally Benign ◽  
Facile Synthesis ◽  
Metal Free ◽  
Catalytic Transformations

AbstractA facile and environmentally benign access to N-aryl/alkyl-4H-benzoxazin-2-amines is achieved from 1-[2-(hydroxymethyl)phenyl/alkyl]-3-phenylthioureas under transition-metal-free conditions. The conversions occur smoothly in the presence of a catalytic amount of molecular iodine and hydrogen peroxide as the oxidant in tetrahydrofuran at room temperature to afford moderate to good yields (28–90%) of the desired products within 2 hours. This method reports the first examples of the catalytic transformations of 1-[2-(hydroxymethyl)phenyl/alkyl]-3-phenylthioureas into N-aryl/alkyl-4H-benzoxazin-2-amines based on desulfurative cyclization.

scholarly journals Author Correction: A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qingyao Wu ◽  
Jingjing Cao ◽  
Xiao Wang ◽  
Yan Liu ◽  
Yajie Zhao ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Free ◽  
Highly Efficient

A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-21490-z

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