Heteropoly acid/NaY zeolite as a reusable solid catalyst for highly efficient synthesis of gem-dihydroperoxides and 1,2,4,5-tetraoxanes

2016 ◽  
Vol 40 (12) ◽  
pp. 744-749 ◽  
Author(s):  
Kaveh Khosravi ◽  
Mojgan Zendehdel ◽  
Shirin Naserifar ◽  
Fatemeh Tavakoli ◽  
Kobra Khalaji ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Heteropoly Acid ◽  
Solid Catalyst ◽  
Efficient Synthesis ◽  
Nay Zeolite ◽  
Aqueous Hydrogen Peroxide ◽  
Highly Efficient ◽  
Aldehydes And Ketones

gem-Dihydroperoxides and 1,2,4,5-tetraoxanes were synthesised from aldehydes and ketones catalysed by heteropoly acid/NaY zeolite (HPA/NaY) as a new, effective and reusable solid catalyst using 30% aqueous hydrogen peroxide at room temperature. The reactions proceeded with high rates and excellent yields.

scholarly journals AN EFFICIENT SYNTHESIS OF GEM-DIHYDROPEROXIDES AND 1,2,4,5-TETRAOXANES CATALYZED BYCHLOROSULFONIC ACIDAS A NEW CATALYST

2015 ◽  
Vol 11 (3) ◽  
pp. 3381-3390 ◽  
Author(s):  
Kaveh Khosravi ◽  
Atefeh Asgari
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Low Cost ◽  
Chlorosulfonic Acid ◽  
Solid Catalyst ◽  
Efficient Synthesis ◽  
Aqueous Hydrogen Peroxide

Chlorosulfonic acid was used as an active, low-cost and reusable solid catalyst for conversion of ketones and aldehydes to corresponding gem-dihydroperoxides using 30% aqueous hydrogen peroxide at room temperature. The reactions proceed with high rates and excellent yields.

CuI/Et2NH-Catalyzed One-Pot Highly Efficient Synthesis of 1,4-Disubstituted 1,2,3-Triazoles in Green Solvent Glycerol

Synthesis ◽  
2018 ◽  
Vol 50 (11) ◽  
pp. 2191-2199 ◽  
Author(s):  
Yongde Zhao ◽  
Shengqiang Guo ◽  
Yang Zhou ◽  
Bencai Dai ◽  
Cuimeng Huo ◽  
...  
Keyword(s):  
Catalytic System ◽  
Sodium Azide ◽  
Room Temperature ◽  
Green Solvent ◽  
Efficient Synthesis ◽  
One Pot ◽  
Highly Efficient ◽  
Three Component Reaction ◽  
Efficient Route ◽  
Terminal Acetylenes

A concise one-pot three-component reaction of organic halides­, terminal acetylenes, and sodium azide provided an efficient route for the synthesis of 1,2,3-triazoles. A variety of 1,2,3-triazoles were prepared in good to excellent yields with green solvent glycerol. This procedure used CuI and diethylamine, which are two easily available reagents as the new catalytic system at room temperature.

scholarly journals Highly Efficient Synthesis of Hindered 3-Azoindoles via Metal-Free C–H Functionalization of Indoles

Synthesis ◽  
2020 ◽  
Vol 52 (04) ◽  
pp. 574-580
Author(s):  
Nicolas Jacob ◽  
Lucas Guillemard ◽  
Joanna Wencel-Delord
Keyword(s):  
Steric Hindrance ◽  
Room Temperature ◽  
Efficient Synthesis ◽  
Atom Economy ◽  
Photochromic Compounds ◽  
Metal Free ◽  
Highly Efficient ◽  
Simple Protocol ◽  
Potential Applications

Although 3-azoindoles have recently emerged as an appealing family of photoswitch molecules, the synthesis of such compounds has been poorly covered in the literature. Herein a high-yielding and operationally simple protocol is reported allowing the synthesis of 3-azoindoles, featuring important steric hindrance around the azo motif. Remarkably, this C–H coupling is characterized by excellent atom economy and occurs under metal-free conditions, at room temperature, and within few minutes, delivering the expected products in excellent yields (quantitatively in most of the cases). Accordingly, a library of new molecules, with potential applications as photochromic compounds, is prepared.

Bimetallic titanium complex catalyzed enantioselective oxidation of thioethers using aqueous H2O2 as a terminal oxidant

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47732-47739 ◽  
Author(s):  
Prasanta Kumar Bera ◽  
Naveen Gupta ◽  
Sayed H. R. Abdi ◽  
Noor-ul H. Khan ◽  
Rukhsana I. Kureshy ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic System ◽  
Sulfide Oxidation ◽  
Environmentally Benign ◽  
Aqueous Hydrogen Peroxide ◽  
Titanium Complex ◽  
Enantioselective Oxidation ◽  
Highly Efficient

This study represents a highly efficient sulfide oxidation catalytic system using a non-toxic Ti-catalyst and environmentally benign aqueous hydrogen peroxide.

Hydrosilylation of carbonyls over electron-enriched Ni sites of intermetallic compound Ni3Ga heterogeneous catalyst

2021 ◽  
Author(s):  
Tomoaki Takayama ◽  
Rio Kariya ◽  
Yuki Nakaya ◽  
Shinya Furukawa ◽  
Seiji Yamazoe ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Aldehydes And Ketones

Nanoparticulate intermetallic compound Ni3Ga supported on SiO2 has emerged as a highly efficient catalyst for the hydrosilylation of carbonyls, such as aldehydes and ketones, at room temperature.

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