- Pentafluorophenylammonium Triflate: A Mild, Efficient and Reusable Catalyst for the Synthesis of 2-Arylbenzothiazole and 2-Arylbenzothiazoline Derivatives in a Green Chemical Approach
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In this work, one pot, simple and environmentally benign effective synthesis of 2-substituted benzothiazole and benzothiazoline derivatives are described in presence of PFPAT (pentafluorophenylammonium triflate) catalyst in water successfully. A series of benzothiazole derivative were synthesized by the reaction between 2-aminothiophenol and various aldehydes in good yields. Recyclability of the catalyst is observed for four times without loss of its activity in aqueous medium.
- Datta, Arup
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- Synthesis of 1,2,4-triazolo[5,1-b][1,3]-thiazin-7-ones catalyzed by pentafluorophenylammonium triflate
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Pentafluorophenylammonium triflate has been found to be an outstanding catalyst for the cyclization of 3-(4H-1,2,4-triazol-3-ylsulfanyl)- acrylic acids into 1,2,4-triazolo[5,1-b][1,3]thiazin-7-ones under solvent-free microwave irradiation and conventional
- Montazeri,K. Pourshamsian,A. Divsalar,M. Ghoorchi-Beigi
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experimental part
p. 2802 - 2804
(2012/08/28)
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- Pentafluorophenylammonium triflate-CuCl2: A mild, efficient and reusable heterogeneous catalyst system for facile synthesis of 4(3H)-quinazolinones under solvent-free conditions
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Pentafluorophenylammonium triflate (PFPAT) was found to be highly efficient, and recyclable heterogeneous catalyst for the synthesis of 4(3H)-quinazolinones by cyclocondensation reaction of 2-aminobenzamide with aryl aldehydes in the presence of CuCl2 as co-catalyst in good to excellent yields under solvent-free conditions. The present methodology offers several advantages, such as simple procedure with an easy work-up, high yields, short reaction times, and the absence of any volatile or hazardous organic solvents. Moreover, the catalyst can be easily recovered and reused at least three times with only slight reduction in its catalytic activity.
- Montazeri, Naser,Pourshamsian, Khalil,Yosefiyan, Soghra,Momeni, Seydeh Samaneh
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p. 883 - 887,5
(2020/09/09)
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- Organic-acid-based catalyst for production of polylactic acid
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Provided is a new organic-acid-based catalyst enabling production of a polyhydroxycarboxylic acid by direct dehydration polycondensation of a hydroxycarboxylic acid such as L-lactic acid, specifically, an organic-acid-based catalyst comprising an amine sa
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