ChemInform Abstract: Sulfamic Acid: An Efficient, Cost-Effective, and Reusable Solid Acid Catalyst for the Synthesis of 1,8-Naphthyridines under Solvent-Free Heating and Microwave Irradiation.

ChemInform ◽  
2009 ◽  
Vol 40 (6) ◽  
Author(s):  
Y. Thirupathi Reddy ◽  
P. Raghotham Reddy ◽  
M. Nikhil Reddy ◽  
B. Rajitha ◽  
Peter A. Crooks
Keyword(s):  
Microwave Irradiation ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Cost Effective ◽  
Solvent Free

Sulfamic Acid: An Efficient, Cost-Effective and Recyclable Solid Acid Catalyst for the Friedlander Quinoline Synthesis.

ChemInform ◽  
2006 ◽  
Vol 37 (5) ◽  
Author(s):  
J. S. Yadav ◽  
P. Purushothama Rao ◽  
D. Sreenu ◽  
R. Srinivasa Rao ◽  
V. Naveen Kumar ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Cost Effective

Sulfamic acid: an efficient, cost-effective and recyclable solid acid catalyst for the three-component synthesis of α-amino nitriles

2007 ◽  
Vol 48 (23) ◽  
pp. 4059-4060 ◽  
Author(s):  
Akbar Heydari ◽  
Samad Khaksar ◽  
Mehrdad Pourayoubi ◽  
Ali Reza Mahjoub
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Cost Effective

An efficient, Green Synthesis of benzo[a]furo[2, 3-c]phenazine derivatives via Microwave-Assisted and TiO2-SO3H as Cost-effective and Recyclable Catalyst under solvent-free conditions

2020 ◽  
Vol 17 ◽  
Author(s):  
Milad Taheri ◽  
Razieh Mohebat ◽  
Mohammad Hossein Moslemin
Keyword(s):  
Microwave Irradiation ◽  
Solid Acid Catalyst ◽  
Internal Standard ◽  
Acid Catalyst ◽  
Cost Effective ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Recyclable Heterogeneous Catalyst

Background: A rapid, efficient, and environmentally benign procedure for the synthesis of novel furo [2,3- c]phenazine derivatives has been developed via reactions of 2-hydroxynaphthalene-1,4-dione, arylglyoxals, and indole in the presence of TiO2-SO3H-catalyst (TSAC) as a recyclable heterogeneous catalyst under solvent-free conditions using microwave irradiation. Introduction: This study describes a successful approach for the synthesis of 2-(4-bromophenyl)-1-(1H-indol-3-yl) benzo[a]furo[2,3-c] phenazine via TiO2-SO3H-catalyst using microwave irradiation. Objectives: In this paper, we wish to report an efficient and convenient method for the synthesis of phenazine derivatives from benzo[a]phenazin-5-ol, arylglyoxal derivatives, and Indoles in the presence of TiO2-SO3H-catalyst under microwave irradiation. Materials and Methods: All reagents and solvent were purchased from Merck and Aldrich and used without further purification. 1H NMR spectra (DMSO) were recorded on Gemini-500 MHz spectrophotometer with TMS as internal standard. Results and Discussions: To investigate the reaction conditions for the synthesis of 2-(4-bromophenyl)-1-(1H-indol-3-yl) benzo[a]furo [2, 3-c] phenazine derivatives, we performed a reaction between 2-hydroxynaphthalene-1,4-dione (1 mmol) and aromatic 1,2-diamines (1 mmol) as a model. Conclusion: We demonstrated a green and straightforward procedure for the efficient synthesis of novel benzo[a]furo[2, 3- c] phenazine derivatives in high yields via a one-pot, four-component domino protocol by using TiO2-SO3H as a mild, effective, non-toxic, and inexpensive solid acid catalyst without the addition of an organic co-solvent.

Sulfamic Acid: An Efficient, Cost-Effective and Recyclable Solid Acid Catalyst for the Three-Component Synthesis of α-Amino Nitriles

ChemInform ◽  
2007 ◽  
Vol 38 (38) ◽  
Author(s):  
Akbar Heydari ◽  
Samad Khaksar ◽  
Mehrdad Pourayoubi ◽  
Ali Reza Mahjoub
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Cost Effective
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