Highly selective direct azidation of alcohols over a heterogeneous povidone–phosphotungstic solid acid catalyst

2016 ◽  
Vol 40 (12) ◽  
pp. 10240-10245 ◽  
Author(s):  
Sumit Kamble ◽  
Sagar More ◽  
Chandrashekhar Rode
Keyword(s):  
Room Temperature ◽  
Solid Acid ◽  
Phosphotungstic Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Product Yields ◽  
Acid Catalyzed

A heterogeneous povidone–phosphotungstic acid catalyzed direct selective azidation of alcohols gave excellent product yields at room temperature.

Production of furfural from xylose catalyzed by a novel calcium gluconate derived carbon solid acid in 1,4-dioxane

2020 ◽  
Vol 44 (19) ◽  
pp. 7968-7975 ◽  
Author(s):  
Tao Yang ◽  
Wenzhi Li ◽  
Mingxue Su ◽  
Yang Liu ◽  
Minghou Liu
Keyword(s):  
High Temperature ◽  
Calcium Gluconate ◽  
Room Temperature ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Based

A novel carbon-based solid acid catalyst (SC-GCa-800) was prepared by the high-temperature carbonization of calcium gluconate followed by sulfonation with 4-diazoniobenzenesulfonate at room temperature.

Efficient Synthesis of 2,3-Dihydro-1H-Perimidine Derivatives Using HBOB as a Novel Solid Acid Catalyst

2012 ◽  
Vol 65 (1) ◽  
pp. 86 ◽  
Author(s):  
Sunanda B. Phadtare ◽  
R. Vijayraghavan ◽  
Ganapati S. Shankarling ◽  
Douglas R. MacFarlane
Keyword(s):  
Boric Acid ◽  
Efficient Method ◽  
Solid Acid ◽  
Simple Procedure ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Thermal Processes ◽  
Efficient Synthesis ◽  
Acid Catalyzed ◽  
Time Required

An efficient method for the synthesis of substituted 2,3-dihydro-1H-perimidine derivatives is described using bis(oxalato)boric acid (HBOB) as catalyst. The methodology provides an easily handled and recyclable catalyst for this type of reaction as an alternative platform to the conventional acid-catalyzed thermal processes. The time required to complete the reaction using HBOB was found to be shorter than conventional methods. Recycling of the catalyst has been efficiently achieved using a simple procedure.

Envirocat EPZ-10: An Efficient Catalyst for the Synthesis of 1,2,4- Triazolidine-3-thiones

2020 ◽  
Vol 17 (4) ◽  
pp. 321-326
Author(s):  
Pradeep M. Mhaldar ◽  
Dattaprasad M. Pore
Keyword(s):  
Present Method ◽  
Room Temperature ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Environmentally Benign ◽  
Temperature Synthesis ◽  
Efficient Catalyst ◽  
Green Catalyst ◽  
Catalyst Reusability

A simple and environmentally benign room temperature synthesis of 1,2,4-triazolidine-3- thiones is described using Envirocat EPZ-10R as a solid acid catalyst in the aqueous medium. The use of Envirocat EPZ-10R as a green catalyst, reusability of the catalyst, water as a universal solvent and good yields of the product are the attractive features of the present method.

Catalytic Method for Synthesis of Aspirin by a Green, Efficient and Recyclable Solid Acid Catalyst (Preyssler's Anion) at Room Temperature

2007 ◽  
Vol 54 (4) ◽  
pp. 1017-1020 ◽  
Author(s):  
Fatemeh F. Bamoharram ◽  
Majid M. Heravi ◽  
Mina Roshani ◽  
Ali Gharib ◽  
Manouchehr Jahangir
Keyword(s):  
Room Temperature ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Catalytic Method

Selective Monoesterification of Malonic Acid Catalyzed by Boric Acid

2007 ◽  
Vol 60 (11) ◽  
pp. 821 ◽  
Author(s):  
Stephan M. Levonis ◽  
Laurent F. Bornaghi ◽  
Todd A. Houston
Keyword(s):  
Boric Acid ◽  
Malonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Acid Catalyzed

Boric acid catalyzes the monoesterification of malonic acid, likely through a chelation mechanism that is not available to the monoester product. Under more forcing conditions, diesters form to some extent, but conditions can be optimized to favour the monoester product (56–80%). With the easily handled solid acid catalyst, these reactions can be run with excess alcohol as solvent or with stoichiometric amounts of alcohol in acetonitrile with moderate heating.

Nano-Sized and -Crystalline Sulfated Zirconia Solid Acid Catalysts for Organic Synthesis

2013 ◽  
Vol 757 ◽  
pp. 69-83
Author(s):  
Meghshyam K. Patil ◽  
Sharekh Shaikh
Keyword(s):  
Sulfated Zirconia ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Practical Significance ◽  
Synthesis Routes ◽  
Acid Catalyzed ◽  
Synthetic Methodologies ◽  
The Individual ◽  
Interesting Area

Sulfated Zirconia (SZ) has opened up a very interesting area for application predominantly as catalyst for various acid catalyzed organic syntheses and transformation reactions. Catalytic properties of SZ vary with methods of preparation. Lot of efforts is made to modify SZ to increase reactivity and stability of the catalyst. This review focuses on the individual synthesis routes to prepare nano-sized and –crystalline SZ, short discussion on its characterization and exhaustive survey on its utility in organic chemistry for the development of new synthetic methodologies, which provide simple direction having enormous practical significance. As can be realized, the nano-sized and –crystalline SZ as solid acid catalyst exhibits exceptionally better catalytic activity and selectivity for the synthesis of trisubstituted and tetrasubstituted imidazoles, acetyl salicylic acid, dypnone, esterification of acetic acid, caprylic acid and so on.

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