scholarly journals Efficient deprotection of F-BODIPY derivatives: removal of BF2 using Brønsted acids

2015 ◽  
Vol 11 ◽  
pp. 37-41 ◽  
Author(s):  
Mingfeng Yu ◽  
Joseph K-H Wong ◽  
Cyril Tang ◽  
Peter Turner ◽  
Matthew H Todd ◽  
...  
Keyword(s):  
Hydrogen Chloride ◽  
Trifluoroacetic Acid ◽  
Room Temperature ◽  
Bronsted Acids ◽  
Efficient Removal ◽  
Work Up

The effective and efficient removal of the BF2 moiety from F-BODIPY derivatives has been achieved using two common Brønsted acids; treatment with trifluoroacetic acid (TFA) or methanolic hydrogen chloride (HCl) followed by work-up with Ambersep® 900 resin (hydroxide form) effects this conversion in near-quantitative yields. Compared to existing methods, these conditions are relatively mild and operationally simple, requiring only reaction at room temperature for six hours (TFA) or overnight (HCl).

An efficient multicomponent, one-pot synthesis of Betti bases catalyzed by cerium (IV) ammonium nitrate (CAN) at ambient temperature

2016 ◽  
Vol 5 (4) ◽  
Author(s):  
Ramadan Ahmed Mekheimer ◽  
Abdullah Mohamed Asiri ◽  
Afaf Mohamed Abdel Hameed ◽  
Reham R. Awed ◽  
Kamal Usef Sadek
Keyword(s):  
Ambient Temperature ◽  
Environmental Pollution ◽  
Ammonium Nitrate ◽  
Room Temperature ◽  
Catalytic Amount ◽  
High Yield ◽  
Reaction Conditions ◽  
One Pot ◽  
Work Up ◽  
Cerium Iv Ammonium Nitrate

AbstractStarting from readily available 2-naphthol, aldehydes, aryl and alkylamines, a variety of Betti bases were efficiently synthesized utilizing a catalytic amount of cerium (IV) ammonium nitrate (CAN) at room temperature. This protocol has advantages of high yield, mild reaction conditions, no environmental pollution, diversity of reactants and simple work up procedure.

Defect Engineering and Synergistic Effect in Co3O4 Catalysts for Efficient Removal of Formaldehyde at Room Temperature

2020 ◽  
Vol 59 (42) ◽  
pp. 18781-18789
Author(s):  
Jinwei Chen ◽  
Meng Huang ◽  
Wang Chen ◽  
Haiyan Tang ◽  
Yi Jiao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Room Temperature ◽  
Defect Engineering ◽  
Efficient Removal

scholarly journals Hydroxyapatite-Supported Low-Content Pt Catalysts for Efficient Removal of Formaldehyde at Room Temperature

ACS Omega ◽  
2019 ◽  
Vol 4 (26) ◽  
pp. 21998-22007 ◽  
Author(s):  
Zhihua Xu ◽  
Gang Huang ◽  
Zhaoxiong Yan ◽  
Nenghuan Wang ◽  
Lin Yue ◽  
...  
Keyword(s):  
Room Temperature ◽  
Pt Catalysts ◽  
Efficient Removal

scholarly journals A Facile Solvent-Free Route for One-Pot Multicomponent Synthesis of Benzylpyrazolyl Coumarins Derivatives in Presence of Effective Synergetic Catalytic System

2019 ◽  
Vol 31 (6) ◽  
pp. 1357-1361 ◽  
Author(s):  
NARENDRA R. KAMBLE ◽  
VINOD T. KAMBLE
Keyword(s):  
Room Temperature ◽  
Silver Salt ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Niobium Pentachloride ◽  
Solvent Free Conditions ◽  
Work Up ◽  
Solvent Free Reaction

A combinatorial library of benzylpyrazolyl coumarin derivatives have been synthesized by a green one-pot four-component reaction between aryl hydrazine/hydrazine hydrate (1), ethyl acetoacetate (2), aromatic aldehydes (3) and 4-hydroxycoumarin (4) catalyzed by niobium pentachloride with silver salt under solvent-free conditions has been developed. Experimental simplicity, simple work-up procedure and solvent-free reaction condition at room temperature are important features of the present protocol.

scholarly journals Synthesis of Pyrazolo-Fused 4-Azafluorenones in an Ionic Liquid. Mechanistic Insights by Joint Studies Using DFT Analysis and Mass Spectrometry

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 820
Author(s):  
Efraín Polo ◽  
Valentina Arce-Parada ◽  
Xaviera A. López-Cortés ◽  
Jesús Sánchez-Márquez ◽  
Alejandro Morales-Bayuelo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Density Functional ◽  
Room Temperature ◽  
Theoretical Study ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
Conceptual Density Functional Theory ◽  
Functional Theory ◽  
Three Component Reaction ◽  
Work Up

A series of pyrazolo-fused 4-azafluorenones (indeno[1,2-b]pyrazolo[4,3-e]pyridines, IPP) were synthesized via the three-component reaction between arylaldehydes, 3-methyl-1H-pyrazol-5-amine and 1,3-indanedione in an ionic liquid as a catalyst at room temperature. The applied synthetic route has the advantages of easy work-up under mild reaction conditions presenting moderate yields and an environmentally benign procedure. A theoretical study based on conceptual-density functional theory has been done, bond reactivity indices have been calculated and an electrophilic and nucleophilic character of localized orbitals has been determined to analyze the possible electronic mechanisms.

Water-Assisted Organocatalysis: An Enantioselective Green Protocol for the Henry Reaction

2013 ◽  
Vol 66 (6) ◽  
pp. 661 ◽  
Author(s):  
Prashant B. Thorat ◽  
Santosh V. Goswami ◽  
Wamanrao N. Jadhav ◽  
Sudhakar R. Bhusare
Keyword(s):  
Hydrogen Bonding ◽  
Room Temperature ◽  
Enantioselective Synthesis ◽  
Henry Reaction ◽  
Reaction Conditions ◽  
Green Protocol ◽  
Excellent Yield ◽  
Water As Solvent ◽  
Nitroaldol Reaction ◽  
Work Up

We report an enantioselective Henry (nitroaldol) reaction catalysed by an organocatalyst using water as solvent. The enantioselective synthesis of β-nitroalcohols was achieved by using a neutral chiral organocatalyst, through strong hydrogen bonding, which results in the formation of corresponding products in excellent yield and enantioselectivity at room temperature. Other attractive features of the method are the eco-friendly, non-hazardous, and mild reaction conditions, inexpensive catalyst, and simple work up conditions.

scholarly journals A facile synthesis of phenazine and quinoxaline (new 1,4-benzo diazine) derivatives using magnesium sulfate heptahydrate as a catalyst

2011 ◽  
Vol 76 (9) ◽  
pp. 1191-1198 ◽  
Author(s):  
Bahador Karami ◽  
Saeed Khodabakhshi
Keyword(s):  
Catalytic Activity ◽  
Magnesium Sulfate ◽  
Room Temperature ◽  
Facile Synthesis ◽  
Dicarbonyl Compounds ◽  
Sulfate Heptahydrate ◽  
Quinoxaline Derivatives ◽  
Work Up ◽  
Derivatives Of

Convenient and simple procedures for the synthesis of phenazine and quinoxaline derivatives were developed via a reaction of ophenylenediamines and 1,2-dicarbonyl compounds. In addition, the synthesis of two new derivatives of 1,4-benzo diazine derivatives and the catalytic activity of magnesium sulfate heptahydrate (MgSO4?7H2O) in the room temperature condensation of o-phenylenediamines and 1,2- dicarbonyl compounds in ethanol as solvent are reported. This method has many appealing attributes, such as excellent yields, short reactions times, and simple work-up procedures.

Facile and direct synthesis of symmetrical acid anhydrides using a newly prepared powerful and efficient mixed reagent

2015 ◽  
Vol 69 (3) ◽  
Author(s):  
Hamed Rouhi-Saadabad ◽  
Batool Akhlaghinia
Keyword(s):  
Carboxylic Acids ◽  
Room Temperature ◽  
Low Cost ◽  
Direct Synthesis ◽  
Reaction Conditions ◽  
Experimental Procedure ◽  
Short Reaction Time ◽  
Acid Anhydrides ◽  
Work Up ◽  
Trichloroisocyanuric Acid

AbstractAn efficient mixed reagent for direct synthesis of symmetrical carboxylic anhydrides from carboxylic acids has been prepared. Carboxylic acids are converted to anhydrides using triphenylphosphine/ trichloroisocyanuric acid under mild reaction conditions at room temperature. Short reaction time, excellent yields of products, low cost, availability of reagents, simple experimental procedure, and easy work-up of the products are the main advantages of the presented method.

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