Synthesis of intermediate sitting-atop complexes (i-SAT) from the reaction between free base meso-tetraarylporphyrins and phosphorus(III) chloride in solvent free media

Polyhedron ◽  
2008 ◽  
Vol 27 (15) ◽  
pp. 3263-3266 ◽  
Author(s):  
Hossein Dehghani ◽  
Maryam Shaterian
Keyword(s):  
Solvent Free ◽  
Free Base ◽  
Free Media

scholarly journals Design of a New Gemini Lipoaminoacid with Immobilized Lipases Based on an Eco-Friendly Biosynthetic Process

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 164
Author(s):  
Patrícia M. Carvalho ◽  
Rita C. Guedes ◽  
Maria R. Bronze ◽  
Célia M. C. Faustino ◽  
Maria H. L. Ribeiro
Keyword(s):  
High Performance ◽  
Transfection Efficiency ◽  
Sol Gel ◽  
Reaction Rates ◽  
Solvent Free ◽  
Bioactive Molecules ◽  
Thermomyces Lanuginosus ◽  
Chemical Production ◽  
Immobilized Lipases ◽  
Free Media

Lipoaminoacids (LAA) are an important group of biosurfactants, formed by a polar hydrophilic part (amino acid) and a hydrophobic tail (lipid). The gemini LAA structures allow the formation of a supramolecular complex with bioactive molecules, like DNA, which provides them with good transfection efficiency. Since lipases are naturally involved in lipid and protein metabolism, they are an alternative to the chemical production of LAA, offering an eco-friendly biosynthetic process option. This work aimed to design the production of novel cystine derived gemini through a bioconversion system using immobilized lipases. Three lipases were used: porcine pancreatic lipase (PPL); lipase from Thermomyces lanuginosus (TLL); and lipase from Rizhomucor miehei (RML). PPL was immobilized in sol-gel lenses. L-cystine dihydrochloride and dodecylamine were used as substrates for the bioreaction. The production of LAA was evaluated by thin layer chromatography (TLC), and colorimetric reaction with eosin. The identification and quantification was carried out by High Performance Liquid Chromatographer-Mass Spectrometry (HPLC-MS/MS). The optimization of media design included co-solvent (methanol, dimethylsulfoxide), biphasic (n-hexane and 2-propanol) or solvent-free media, in order to improve the biocatalytic reaction rates and yields. Moreover, a new medium was tested where dodecylamine was melted and added to the cystine and to the biocatalyst, building a system of mainly undissolved substrates, leading to 5 mg/mL of LAA. Most of the volume turned into foam, which indicated the production of the biosurfactant. For the first time, the gemini derived cystine lipoaminoacid was produced, identified, and quantified in both co-solvent and solvent-free media, with the lipases PPL, RML, and TLL.

scholarly journals A solvent-free, base-catalyzed domino reaction towards trifluoromethylated benzenes from bio-based methyl coumalate

2018 ◽  
Vol 20 (7) ◽  
pp. 1491-1498 ◽  
Author(s):  
Liang Chang ◽  
Nadja Klipfel ◽  
Luc Dechoux ◽  
Serge Thorimbert
Keyword(s):  
Solvent Free ◽  
Domino Reaction ◽  
Free Base ◽  
High Yields

An efficient and sustainable method to prepare pharmaceutically important trifluoromethyl-benzenes from bio-based methyl coumalate in high yields, in a solvent-free tBuOK-catalyzed domino sequence.

Enamination of β-Dicarbonyl Compounds Catalyzed by CeCl3·7H2O at ­Ambient Conditions: Ionic Liquid and Solvent-Free Media

Synlett ◽  
2004 ◽  
Vol 2004 (11) ◽  
pp. 1980-1984 ◽  
Author(s):  
Mohammad Khodaei ◽  
Ahmad Khosropour ◽  
Mehdi Kookhazadeh
Keyword(s):  
Ionic Liquid ◽  
Solvent Free ◽  
Ambient Conditions ◽  
Dicarbonyl Compounds ◽  
Free Media

scholarly journals One-step enzymatic production of fatty acid ethyl ester from high-acidity waste feedstocks in solvent-free media

2011 ◽  
Vol 102 (20) ◽  
pp. 9653-9658 ◽  
Author(s):  
Ilvania C. Véras ◽  
Frederico A.L. Silva ◽  
Astria D. Ferrão-Gonzales ◽  
Vitor Hugo Moreau
Keyword(s):  
Fatty Acid ◽  
Ethyl Ester ◽  
Acid Ethyl Ester ◽  
Fatty Acid Ethyl Ester ◽  
Solvent Free ◽  
Enzymatic Production ◽  
High Acidity ◽  
One Step ◽  
Free Media

scholarly journals K-10 clay as a reusable catalyst for the solvent-free MW-induced synthesis of enaminones

2014 ◽  
Vol 79 (8) ◽  
pp. 921-926 ◽  
Author(s):  
Omid Marvi ◽  
Masoud Giahi ◽  
Pouran Ayub ◽  
Mohammad Nikpasand
Keyword(s):  
Microwave Irradiation ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Dicarbonyl Compounds ◽  
Unsaturated Ketones ◽  
Acidic Catalyst ◽  
Free Media

A series of ?-amino-?, ?-unsaturated ketones and esters synthesized from the reaction of different amines with 1,3- dicarbonyl compounds in solvent-free media using montmorillonite K-10 clay as solid recyclable heterogeneous acidic catalyst and microwave irradiation in good to excellent yields.

Aluminium complex as an efficient catalyst for the chemo-selective reduction of amides to amines

2019 ◽  
Vol 48 (31) ◽  
pp. 11978-11984 ◽  
Author(s):  
Suman Das ◽  
Himadri Karmakar ◽  
Jayeeta Bhattacharjee ◽  
Tarun K. Panda
Keyword(s):  
Selective Reduction ◽  
Solvent Free ◽  
Free Base ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Earth Abundant

Catalytic chemo-selective reduction of tert-amides with pinacolborane (HBpin) to furnish the corresponding tert-amines using an Earth-abundant Al complex under solvent-free, base-free and mild conditions is reported.

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