TiO2–SO42− as a novel solid acid catalyst for highly efficient, solvent free and easy synthesis of chalcones under microwave irradiation

2011 ◽  
Vol 12 (5) ◽  
pp. 375-379 ◽  
Author(s):  
B. Krishnakumar ◽  
R. Velmurugan ◽  
M. Swaminathan
Keyword(s):  
Microwave Irradiation ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Highly Efficient

Biomass derived β-cyclodextrin-SO3H as a solid acid catalyst for esterification of carboxylic acids with alcohols

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 12981-12986 ◽  
Author(s):  
Raju S. Thombal ◽  
Amol R. Jadhav ◽  
Vrushali H. Jadhav
Keyword(s):  
Carboxylic Acids ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Highly Efficient ◽  
Carbon Based

A novel b-cyclodextrin-SO3H carbon based solid acid catalyst was prepared and proved highly efficient in solvent free esterification of carboxylic acids with alcohols. The catalyst was easily recovered and reused without any impact on the yields.

scholarly journals Synthesis of Medicinally Important Indole Derivatives: A Review

2021 ◽  
Vol 15 (1) ◽  
pp. 1-16
Author(s):  
Deeptanu Sarkar ◽  
Andleeb Amin ◽  
Tanzeela Qadir ◽  
Praveen K. Sharma
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Functional Group ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Indole Derivatives ◽  
Site Specific ◽  
Bioactive Natural Products ◽  
Solvent Free Conditions

Indoles constitute a widely occurring functional group in nature and are present in an extensive number of bioactive natural products and medicinally important compounds. As a result, exponential increases in the development of novel methods for the formation of indole core along with site-specific indoles have been established. Conventional methods for the synthesis of indoles are getting replaced with green methods involving ionic liquids, water as a solvent, solid acid catalyst, microwave irradiation and the use of nanoparticles under solvent-free conditions. In addition, there are immense applications of the substituted indoles in diverse fields.

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