Silica Sulfuric Acid as a Recyclable Catalyst for a One-Pot Synthesis of α-Aminophosphonates in Solvent-Free Conditions

2009 ◽  
Vol 6 (6) ◽  
pp. 470-473 ◽  
Author(s):  
Jing-Jun Yang ◽  
Jin-Ning Dang ◽  
Yu-Wei Chang
Keyword(s):  
Sulfuric Acid ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Silica Sulfuric Acid ◽  
One Pot ◽  
One Pot Synthesis ◽  
Solvent Free Conditions

scholarly journals ZnO Nanoparticles: A Highly Effective and Readily Recyclable Catalyst for the One-Pot Synthesis of 1,8-dioxo-decahydroacridine and 1,8-dioxooctahydro-xanthene Derivatives

2017 ◽  
Vol 57 (1) ◽  
Author(s):  
Javad Safaei-Ghomi ◽  
Mohammad Ali Ghasemzadeh ◽  
Safura Zahedi
Keyword(s):  
Zno Nanoparticles ◽  
Environmentally Friendly ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
One Pot ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Xanthene Derivatives ◽  
Highly Effective ◽  
The One

ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.

scholarly journals Silica sulfuric acid: a reusable solid catalyst for one pot synthesis of densely substituted pyrrole-fused isocoumarins under solvent-free conditions

2013 ◽  
Vol 9 ◽  
pp. 2344-2353 ◽  
Author(s):  
Sudipta Pathak ◽  
Kamalesh Debnath ◽  
Animesh Pramanik
Keyword(s):  
Sulfuric Acid ◽  
Low Cost ◽  
Solvent Free ◽  
Primary Amines ◽  
Solid Catalyst ◽  
Silica Sulfuric Acid ◽  
Reaction Conditions ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Solvent Free Reaction

A convenient and efficient methodology for the synthesis of densely substituted pyrrole-fused isocoumarins, which employs solid-supported silica sulfuric acid (SSA) as catalyst, has been developed. When the mixture of ninhydrin adducts of acetylacetone/ethyl acetoacetate and primary amines was heated on the solid surface of SSA under solvent-free conditions, the pyrrole-fused isocoumarins were formed in good yields. This synthetic method has several advantages such as the employment of solvent-free reaction conditions without the use of any toxic reagents and metal catalysts, the ease of product isolation, the use of a recyclable catalyst, the low cost, the easy availability of the starting materials, and the excellent yields of products.

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