scholarly journals Chemoenzymatic one-pot reaction of noncompatible catalysts: combining enzymatic ester hydrolysis with Cu(i)/bipyridine catalyzed oxidation in aqueous medium

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33614-33626 ◽  
Author(s):  
Henning Sand ◽  
Ralf Weberskirch
Keyword(s):  
Aqueous Medium ◽  
Ester Hydrolysis ◽  
Environmentally Benign ◽  
One Pot ◽  
Benign Synthesis ◽  
Catalyzed Oxidation

Combination of a lipase (CALB) with a Cu/bipyridine catalyst for environmentally benign synthesis of aldehydes from their corresponding esters.

scholarly journals Environmentally Benign Synthesis of Tetra-Substituted Imidazoles through 4-Components Strategy Mediated by (S)-3-Methyl-1, 1-Diphenylbutane-1, 2-Diamine

2018 ◽  
Vol 10 (1) ◽  
pp. 39-50
Author(s):  
M. Rana ◽  
A. Rahman ◽  
P. K. Roy ◽  
H. N. Roy
Keyword(s):  
Cost Effectiveness ◽  
Environmentally Benign ◽  
One Pot ◽  
Benign Synthesis

(S)-3-Methyl-1, 1-diphenylbutane-1, 2-diamine has been found to be a mild and effective organocatalyst for one-pot 4-components synthesis of 1, 2, 4, 5-tetra-substituted imidazoles. The key benefits of this protocol is high yielding, cost effectiveness, easy purification and above all, environmentally benign.

Environmentally benign synthesis of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates using CeO2 nanoparticles as a reusable and robust catalyst

2016 ◽  
Vol 71 (11) ◽  
pp. 1135-1140 ◽  
Author(s):  
Javad Safaei-Ghomi ◽  
Mehrnoosh Asgari-Kheirabadi ◽  
Hossein Shahbazi-Alavi
Keyword(s):  
Condensation Reaction ◽  
Ceo2 Nanoparticles ◽  
Environmentally Benign ◽  
High Yield ◽  
Synthesis And Characterization ◽  
Dimethyl Acetylenedicarboxylate ◽  
One Pot ◽  
Efficient Catalyst ◽  
Benign Synthesis

AbstractIn this work, we report the synthesis and characterization of CeO2 nanoparticles as an efficient catalyst for the preparation of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates via one-pot four-component condensation reaction of dimethyl acetylenedicarboxylate, hydrazine hydrate, malononitrile, and aldehydes in aqueous medium. The use of a non-hazardous organic solvent, easy recovery of the catalyst, compatibility with various functional groups, and high yield of the products make the protocol attractive, greener, and economic.

An Environmentally Benign Synthesis of α-Benzylthiobenzimidazoleacetonitriles Using L-Proline in Aqueous Medium

2013 ◽  
Vol 1 (2) ◽  
pp. 139-141
Author(s):  
Sadhu Srinivas Rao ◽  
Chittireddy Venkata Ramana Reddy ◽  
Pramod Kumar Dubey
Keyword(s):  
Aqueous Medium ◽  
Environmentally Benign ◽  
Benign Synthesis

Environmentally benign synthesis of fluorescent carbon nanodots using waste PET bottle: Highly selective and sensitive detection of Pb2+ ions in aqueous medium

2021 ◽  
Author(s):  
Arnab Ghosh ◽  
Gopal Das
Keyword(s):  
Aqueous Medium ◽  
Polyethylene Terephthalate ◽  
Environmentally Benign ◽  
Carbon Nanodots ◽  
Pet Bottles ◽  
Benign Synthesis ◽  
Waste Polyethylene ◽  
Green Fluorescent ◽  
Fluorescent Carbon Nanodots ◽  
Fluorescent Carbon

Sustainable recycling and safe disposal of waste polyethylene terephthalate (PET) is a growing concern worldwide. In this work, we have synthesized green fluorescent carbon nanodots (CDs) utilizing waste PET bottles...

scholarly journals AN EFFICIENT, GREEN, CATALYST FREE SYNTHESIS AND CRYSTALLOGRAPHIC STUDY OF BENZO-4H-PYRANS IN AQUEOUS MEDIUM

2019 ◽  
Vol 9 (4-A) ◽  
pp. 280-289
Author(s):  
SEKAR SILAMBU SILAMBARASAN ◽  
A. Jamal Abdul Nasser
Keyword(s):  
Single Crystal ◽  
Aqueous Medium ◽  
Michael Addition ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
Monoclinic Space Group ◽  
One Pot ◽  
Green Catalyst ◽  
Space Group ◽  
High Yields

A highly efficient and environmentally benign for the synthesis a of 2-amino-7-hydroxy-4-aryl-4H-chromene-3-carbonitrile derivatives (4a-n) in good to high yields (90%-97%) by one-pot three-component Michael addition reaction of malononitrile, aromatic aldehydes and resorcinol under reflux condition was developed in aqueous medium. Single crystal X-ray studies show that 4h crystallizes in the formula C22H15Cl2N2O2, Mr=410.26, Monoclinic, Space group P2(1)/c, a=12.753(9)Å, b=6.665(4)Å, c=24.050(14) Å, β=102.95(3)A° and 4i C16H10Cl2N2O2, Mr=333.16, Triclinic, Space group P-1, a=6.271(3)Å, b=18.697(5)Å, c =13.794(7) Å,  β =94.269(17)A°. The structure of the products were further confirmed by 1H NMR, 13C NMR, IR and Mass spectrum. Keywords: Benzopyrans, malononitrile, resorcinol, Michael addition, water mediated synthesis, single crystal XRD

scholarly journals Pentafluorophenylammonium triflate: A Mild, Efficient and Reusable Catalyst for the Synthesis of 2-Arylbenzothiazole and 2-Arylbenzothiazoline Derivatives in a Green Chemical Approach

2021 ◽  
Vol 37 (1) ◽  
pp. 95-102
Author(s):  
Arup Datta
Keyword(s):  
Aqueous Medium ◽  
Environmentally Benign ◽  
Reusable Catalyst ◽  
One Pot ◽  
Benzothiazole Derivative ◽  
Chemical Approach ◽  
Effective Synthesis

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.

An Efficient Organocatalyst for Environmentally benign Synthesis of Pyranopyrazole Derivatives in Aqueous Medium

2015 ◽  
Vol 12 (10) ◽  
pp. 734-740 ◽  
Author(s):  
Faiza Boukezzoula ◽  
Taoues Boumoud ◽  
Boudjemaa Boumoud ◽  
Abdelmadjid Debache
Keyword(s):  
Aqueous Medium ◽  
Environmentally Benign ◽  
Benign Synthesis
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