scholarly journals Trifluoroacetic Acid as an Efficient Catalyst for the Room Temperature Synthesis of 2-Aryl-1-arylmethyl-1H-1,3-benzimidazoles in Aqueous Media

2011 ◽  
Vol 8 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Mohammad R. Mohammadizadeh ◽  
S. Zeinakhatoun Taghavi
Keyword(s):  
Trifluoroacetic Acid ◽  
Room Temperature ◽  
Condensation Reaction ◽  
Aqueous Media ◽  
Aromatic Aldehydes ◽  
Temperature Synthesis ◽  
Efficient Catalyst ◽  
Room Temperature Synthesis ◽  
Effective Catalyst

Trifluoroacetic acid (TFA) is introduced as a commercially available, inexpensive and effective catalyst for the selective and eco-compatible synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazolesviacondensation reaction ofo-phenylenediamine derivatives and aromatic aldehydes in ethanol/water at room temperature.

SiO2·12WO3·24H2O: a Highly Efficient Catalyst for the Synthesis of 5-Arylidene Barbituric Acid in the Presence of Water

2009 ◽  
Vol 62 (4) ◽  
pp. 353 ◽  
Author(s):  
Ji-Tai Li ◽  
Ming-Xuan Sun
Keyword(s):  
Room Temperature ◽  
Barbituric Acid ◽  
Aqueous Media ◽  
Aromatic Aldehydes ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Efficient Route ◽  
Acid Catalyzed ◽  
High Yields

The condensation of aromatic aldehydes and barbituric acid catalyzed by SiO2·12WO3·24H2O in aqueous media at room temperature gave 5-arylidene barbituric acid in high yields with or without the use of ultrasound, providing a simple and efficient route to synthesis of these compounds.

An operationally simple green procedure for the synthesis of dihydropyrimido[4,5-d]pyrimidinetriones using CuI nanoparticles as a highly efficient catalyst

2015 ◽  
Vol 70 (3) ◽  
pp. 171-176 ◽  
Author(s):  
Shahrzad Abdolmohammadi ◽  
Maryam Afsharpour
Keyword(s):  
Room Temperature ◽  
Aqueous Media ◽  
Coupling Reaction ◽  
Aromatic Aldehydes ◽  
Significant Loss ◽  
Efficient Catalyst ◽  
Nano Crystalline ◽  
Simple Protocol ◽  
High Yields ◽  
Green Procedure

AbstractA green, efficient and simple protocol was developed for the synthesis of dihydropyrimido[4,5-d]pyrimidinetrione derivatives via a coupling reaction of 6-aminouracils, aromatic aldehydes and urea in aqueous media in the presence of nano-crystalline CuI at room temperature. The products were obtained in high yields. CuI nanoparticles can be recycled three times without significant loss of catalytic activity.

An expedient synthesis of 6-amino-5-[(4-hydroxy-2-oxo-2H-chromen-3-yl)(aryl)methyl]-1,3-dimethyl-2,4,6(1H,3H)-pyrimidinedione derivatives using Fe3O4@TiO2 nanocomposite as an efficient, magnetically separable, and reusable catalyst

2018 ◽  
Vol 73 (8) ◽  
pp. 545-551 ◽  
Author(s):  
Sakineh Fakheri-Vayeghan ◽  
Shahrzad Abdolmohammadi ◽  
Reza Kia-Kojoori
Keyword(s):  
Room Temperature ◽  
Condensation Reaction ◽  
Aqueous Media ◽  
Aromatic Aldehydes ◽  
Reusable Catalyst ◽  
New Process ◽  
Magnetically Separable ◽  
Direct Condensation ◽  
Aryl Methyl

AbstractAn efficient methodology dealing with the Fe3O4@TiO2 nanocomposite-catalyzed direct condensation reaction of 4-hydroxycoumarin, aromatic aldehydes, and 6-amino-1,3-dimethyluracil in aqueous media at room temperature is reported. This new process has been successfully applied to the synthesis of 6-amino-5-[(4-hydroxy-2-oxo-2H-chromen-3-yl)(aryl)methyl]-1,3-dimethyl-2,4,6(1H,3H)-pyrimidinediones in high to excellent yields within 2–3 h.

Willgerodt-Kindler reaction at room temperature: Synthesis of thioamides from aromatic aldehydes and cyclic secondary amines

Tetrahedron ◽  
2019 ◽  
Vol 75 (41) ◽  
pp. 130575 ◽  
Author(s):  
Arun D. Kale ◽  
Yogesh A. Tayade ◽  
Sachin D. Mahale ◽  
Rahul D. Patil ◽  
Dipak S. Dalal
Keyword(s):  
Room Temperature ◽  
Aromatic Aldehydes ◽  
Secondary Amines ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis

Room temperature synthesis of manganese oxide quantum dots and their application as a fluorescent probe for the detection of metal ions in aqueous media

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114632-114638 ◽  
Author(s):  
Shaopeng Rong ◽  
Pengyi Zhang ◽  
Yajie Yang ◽  
Fang Liu
Keyword(s):  
Quantum Dots ◽  
Metal Ions ◽  
Manganese Oxide ◽  
Fluorescent Probe ◽  
Room Temperature ◽  
Aqueous Media ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis ◽  
Facile Route

A rapid and facile route to access fluorescent manganese oxide quantum dots (MOQDs) has been developed at room temperature; the as-prepared MOQDs can serve as a fluorescent probe for the detection of metal ions in aqueous media.

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