scholarly journals Melamine trisulfonic acid catalyzed regioselective nitration of aromatic compounds with sodium nitrate under solvent-free conditions

2017 ◽  
Vol 10 ◽  
pp. S509-S513 ◽  
Author(s):  
Jalal Albadi ◽  
Farhad Shirini ◽  
Bahareh Ghabezi ◽  
Tayebeh Seiadatnasab
Keyword(s):  
Sodium Nitrate ◽  
Aromatic Compounds ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Acid Catalyzed ◽  
Regioselective Nitration ◽  
Melamine Trisulfonic Acid

Solid-state regioselective nitration of activated hydroxyaromatics and hydroxycoumarins with cerium (IV) ammonium nitrate

2005 ◽  
Vol 2005 (11) ◽  
pp. 733-735 ◽  
Author(s):  
Nemai C. Ganguly ◽  
Sanjoy Dutta ◽  
Mrityunjoy Datta ◽  
Prithwiraj De
Keyword(s):  
Solid State ◽  
Ammonium Nitrate ◽  
High Efficiency ◽  
Solvent Free ◽  
High Melting ◽  
Microwave Assisted ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Regioselective Nitration ◽  
Cerium Iv Ammonium Nitrate

Predominant ortho-selective mononitration of low-melting and liquid phenols and hydroxycoumarins in moderate to high yields has been accomplished upon grinding with solid cerium (IV) ammonium nitrate (CAN). Microwave-assisted expeditious CAN-mediated nitration of relatively high melting phenols and hydroxycoumarins with high efficiency and selectively under solvent-free conditions has been also developed to address the problems of sluggishness and low yield for these reluctant substrates.

scholarly journals Silica Supported Acids (SiO2-HClO4, SiO2-KHSO4) as Eco-friendly Reusable Catalysts for Bromination of Aromatic and Heteroaromatic Compoundsusing Kbr Under Solvothermal and Solvent-free Conditions

2021 ◽  
Author(s):  
Vijayshekar pulusu ◽  
Chinna Rajanna Rajanna Kamatala ◽  
Anil Kumar Mardhanpally ◽  
Hemanth Sriram Yel ◽  
Yaku Guguloth ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Reaction Times ◽  
Solvent Free ◽  
Microwave Assisted ◽  
Rate Acceleration ◽  
Solvent Free Conditions ◽  
Ultrasonic Assisted

Abstract Silica supported nanogreenacids like Si-KHSO4, and Si-HClO4are explored as reusable catalysts for bromination of aromatic and hetero aromatic compounds using KBr under solvothermal, and solvent-free conditions. Reaction times reduced from Reacions under conventional solvothermal protocols conditions required (4 – 6) hours, while ultrasonic assisted reactions only (9 – 12) minutes for completion. But, solvent-free microwave assisted reactions required only (1-5) minutes exhibiting striking rate acceleration compared to the solvothermal and ultrasonic assisted protocols All the reaction protocols afforded fairly good yields of brominated products, which are comparable with existing protocols.

Mandelic acid catalyzed one-pot three-component synthesis of α-aminonitriles and α-aminophosphonates under solvent-free conditions at room temperature

2020 ◽  
Vol 50 (10) ◽  
pp. 1545-1560 ◽  
Author(s):  
Gurpreet Kaur ◽  
Mussarat Shamim ◽  
Vaishali Bhardwaj ◽  
Vivek Kumar Gupta ◽  
Bubun Banerjee
Keyword(s):  
Mandelic Acid ◽  
Room Temperature ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Acid Catalyzed

ChemInform Abstract: Silica Supported Perchloric Acid Catalyzed Rapid N-Formylation under Solvent-Free Conditions.

ChemInform ◽  
2012 ◽  
Vol 43 (32) ◽  
pp. no-no
Author(s):  
Mohd. Imran Ansari ◽  
Mohd. Kamil Hussain ◽  
Nisha Yadav ◽  
Puneet K. Gupta ◽  
K. Hajela
Keyword(s):  
Perchloric Acid ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Acid Catalyzed
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