L-Pyrrolidine-2-Carboxylic Acid-4-Hydrogen Sulfate (Supported on Silica Gel) as a New and Efficient Catalyst for Acylation of Alcohols, Phenols and Amines Under Solvent-Free Conditions

2013 ◽  
Vol 10 (5) ◽  
pp. 324-329 ◽  
Author(s):  
Maryam Hajjami ◽  
Arash Ghorbani-Choghamarani ◽  
Zahra Khani
Keyword(s):  
Carboxylic Acid ◽  
Silica Gel ◽  
Solvent Free ◽  
Hydrogen Sulfate ◽  
Efficient Catalyst ◽  
Solvent Free Conditions

scholarly journals ZSM-5-SO3H: An Efficient Catalyst for Acylation of Sulfonamides Amines, Alcohols, and Phenols under Solvent-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Ahmad Reza Massah ◽  
Roozbeh Javad Kalbasi ◽  
Mahdiehsadat Khalifesoltani ◽  
Fariba Moshtagh Kordesofla
Keyword(s):  
Catalytic Activity ◽  
Carboxylic Acid ◽  
Chromatographic Separation ◽  
Solvent Free ◽  
Efficient Catalyst ◽  
Direct Esterification ◽  
Solvent Free Conditions ◽  
Different Types ◽  
Acid Anhydrides ◽  
High Yields

Sulfonamides amines, alcohols, and phenols were efficiently acylated with carboxylic acid anhydrides and chlorides using ZSM-5-SO3H as catalyst under mild and solvent-free conditions. Also, direct esterification of alcohols with carboxylic acids occurred readily in the presence of this catalyst. Different types of amides and esters were obtained in moderate to high yields and purity after a simple workup. No chromatographic separation is needed for isolation of the acylated product. The catalyst was recovered and reused for up to four times without a noticeable decrease in catalytic activity.

scholarly journals Mg(HSO4)2/SiO2 as a Highly Efficient Catalyst for the Green Preparation of 2-Aryl-1,3-Dioxalanes/Dioxanes and Linear Acetals

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Fariba Jafari ◽  
Saeed Khodabakhshi
Keyword(s):  
Organic Solvents ◽  
Environmentally Friendly ◽  
Solvent Free ◽  
High Yield ◽  
Hydrogen Sulfate ◽  
Green Process ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Work Up ◽  
Environmentally Friendly Method

Silica-supported magnesium hydrogen sulfate has been used as a recyclable catalyst for the synthesis of some linear and cyclic aromatic acetals under solvent-free conditions. This environmentally friendly method has advantages, such as high yield of products, simple work-up procedure, and avoidance of the organic solvents, which will contribute in serving as a green process greatly.

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