ChemInform Abstract: Asymmetric Organometallic-Catalyzed Reactions in Aqueous Media

ChemInform ◽  
2010 ◽  
Vol 33 (40) ◽  
pp. no-no
Author(s):  
Denis Sinou
Keyword(s):  
Aqueous Media ◽  
Catalyzed Reactions

Iridium-catalyzed orthogonal and regioselective synthesis of triazole disulfides in aqueous media under mild conditions

2020 ◽  
Vol 22 (8) ◽  
pp. 2394-2398 ◽  
Author(s):  
Ming Li ◽  
Nan Zheng ◽  
Junhao Li ◽  
Yubin Zheng ◽  
Wangze Song
Keyword(s):  
Aqueous Media ◽  
Regioselective Synthesis ◽  
Biological Media ◽  
Mild Conditions ◽  
Catalyzed Reactions

Triazole disulfides were prepared in water or biological media under mild conditions by orthogonal and regioselective Ir-catalyzed reactions.

Organometallic catalysts in synthetic organic chemistry: From reactions in aqueous media to gold catalysis

2008 ◽  
Vol 80 (5) ◽  
pp. 831-844 ◽  
Author(s):  
Jean-Pierre Genêt ◽  
Sylvain Darses ◽  
Véronique Michelet
Keyword(s):  
Aqueous Media ◽  
Gold Catalysis ◽  
Catalytic Reactions ◽  
Organometallic Catalysts ◽  
Water As Solvent ◽  
Recent Developments ◽  
Catalyzed Reactions ◽  
Metal Catalyzed ◽  
Simplified Procedures ◽  
Significant Attention

Water has attracted significant attention as an alternative solvent for transition-metal-catalyzed reactions. The use of water as solvent allows simplified procedures for separation of the catalyst from the products and recycling of the catalyst. Water is an inexpensive reagent for the formation of oxygen-containing products such as alcohols. The use of water as a medium for promoting organometallic and organic reactions is also of great potential. This chapter will focus on old and recent developments in the design and applications of some catalytic reactions using aqueous-phase Pd, Rh, Pt, and Au complexes.

Palladium-catalyzed reactions in aqueous media. An efficient removal of allyloxycarbonyl protecting group from oxygen and nitrogen

1993 ◽  
Vol 34 (26) ◽  
pp. 4189-4192 ◽  
Author(s):  
Jean Pierre Genêt ◽  
Errol Blart ◽  
Monique Savignac ◽  
Stéphane Lemeune ◽  
Jean-Marc Paris
Keyword(s):  
Aqueous Media ◽  
Protecting Group ◽  
Efficient Removal ◽  
Palladium Catalyzed ◽  
Catalyzed Reactions

Kinetics and Mechanisms of the Non-Catalyzed and Manganese(II) Catalyzed Oxidation of Neutral Red with Potassium Periodate in Aqueous Solution

2002 ◽  
Vol 216 (8) ◽  
Author(s):  
Ibrahim A. Salem
Keyword(s):  
Aqueous Media ◽  
Neutral Red ◽  
Potassium Periodate ◽  
First Order ◽  
Rate Of Reaction ◽  
Catalyzed Reactions ◽  
Charged Ions ◽  
Oppositely Charged ◽  
Catalyzed Oxidation ◽  
Activated Complex

A detailed kinetic and spectrophotometric investigation has been made for the oxidation of neutral red, a cationic phenazine dye, using potassium periodate in aqueous media. The rate of the oxidation reaction attained a first order dependence on the dye and the oxidant only at lower concentrations of the latter. The rate of reaction increases with increasing pH of the medium due to the deprotonation of the substrate nitrogen atoms. Moreover, the rate of reaction decreases with increasing ionic strength of the medium, suggesting an interaction between two singly oppositely charged ions in the activated complex. However, addition of trace amounts of manganese(II) ions sharply increases the oxidation rate. Mechanisms are proposed for both the non-catalyzed and manganese(II) catalyzed reactions which are in agreement with the experimental data.

scholarly journals PalladiumPolymer Nanocomposite: An Efficient Catalyst for Green Suzuki–Miyaura Cross-Coupling and Mott-Schottky Nitrobenzene Reduction Processes

2019 ◽  
Vol 55 (2) ◽  
pp. 196-204
Author(s):  
A. V. Zuraev ◽  
Y. V. Grigoriev ◽  
C. M. Verbilo ◽  
L. S. Ivashkevich ◽  
A. S. Lyakhov ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Aqueous Media ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Efficient Catalyst ◽  
Aerobic Conditions ◽  
Reduction Processes ◽  
Nitrobenzene Reduction ◽  
Catalyzed Reactions

A new catalyst for green Suzuki–Miyaura cross-coupling and Mott-Schottky nitrobenzene reduction processes was prepared by thermolysis of palladium (II) poly-5-vinyltetrazolate. Heterogeneous catalyst includes Pd-nanoparticles supported on polymeric matrix. It presents recoverable and recyclable catalyst and the catalyzed reactions proceed in aqueous media at room temperature in aerobic conditions.

scholarly journals Aldol Reactions of Formaldehyde in Non-aqueous Media. VIII. Acid-catalyzed Reactions of alpha,beta-Unsaturated Ketones with Formaldehyde.

1969 ◽  
Vol 23 ◽  
pp. 1033-1039
Author(s):  
Bengt Wesslén ◽  
Karl Heinz Lakowitz ◽  
Charles Larsen ◽  
Per Halfdan Nielsen ◽  
Alf A. Lindberg ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Aldol Reactions ◽  
Unsaturated Ketones ◽  
Acid Catalyzed ◽  
Alpha Beta ◽  
Catalyzed Reactions

scholarly journals Biochar-Based Graphitic Carbon Nitride Adorned with Ionic Liquid Containing Acidic Polymer: A Versatile, Non-Metallic Catalyst for Acid Catalyzed Reaction

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5958
Author(s):  
Samahe Sadjadi ◽  
Fatemeh Koohestani ◽  
Majid Heravi
Keyword(s):  
Ionic Liquid ◽  
Carbon Nitride ◽  
Knoevenagel Condensation ◽  
Biginelli Reaction ◽  
Aqueous Media ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Metallic Catalyst ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

A novel biochar-based graphitic carbon nitride was prepared through calcination of Zinnia grandiflora petals and urea. To provide acidic and ionic-liquid functionalities on the prepared carbon, the resultant biochar-based graphitic carbon nitride was vinyl functionalized and polymerized with 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylic acid and the as-prepared 1-vinyl-3-butylimidazolium chloride. The final catalytic system that benefits from both acidic (–COOH and –SO3H) and ionic-liquid functionalities was applied as a versatile, metal-free catalyst for promoting some model acid catalyzed reactions such as Knoevenagel condensation and Biginelli reaction in aqueous media under a very mild reaction condition. The results confirmed high activity of the catalyst. Broad substrate scope and recyclability and stability of the catalyst were other merits of the developed protocols. Comparative experiments also indicated that both acidic and ionic-liquid functionalities on the catalyst participated in the catalysis.

Sign in / Sign up

Export Citation Format

Share Document