A Facile and New Method for the Synthesis of α-Aryl-N-methylnitrones in Solvent-Free Media Using Silica Gel-NaOH.

ChemInform ◽  
2004 ◽  
Vol 35 (49) ◽  
Author(s):  
M. M. Alavi Nikje ◽  
M. A. Bigdeli ◽  
H. Imanieh
Keyword(s):  
Silica Gel ◽  
Solvent Free ◽  
New Method ◽  
Free Media

scholarly journals Tandem Fries Reaction–Conjugate Addition under Microwave Irradiation in Dry Media; One-pot Synthesis of Flavanones

1999 ◽  
Vol 23 (9) ◽  
pp. 574-575
Author(s):  
Firouz Matloubi Moghaddam ◽  
Mohammad Ghaffarzadeh ◽  
Seyed Hossein Abdi-Oskoui
Keyword(s):  
Microwave Irradiation ◽  
Silica Gel ◽  
Conjugate Addition ◽  
Solvent Free ◽  
Naphthalene Derivatives ◽  
One Pot ◽  
Fries Rearrangement ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Fries Reaction

An AICl3–ZnCl2 mixture supported on silica gel is found to be an efficient medium for the Fries rearrangement of acyloxybenzene or naphthalene derivatives in solvent-free conditions under microwave irradiation.

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.

New method for the synthesis of 3(2H)-pyridazinones and their alkene precursors: Solvent-free reactions under microwave irradiation

1995 ◽  
Vol 6 (5) ◽  
pp. 469-474 ◽  
Author(s):  
Sandrine Jolivet ◽  
Fran�oise Texier-Boullet ◽  
Jack Hamelin ◽  
Patrick Jacquault
Keyword(s):  
Microwave Irradiation ◽  
Solvent Free ◽  
New Method

ChemInform Abstract: Eco-Friendly, Solvent-Free Novel One-Pot, Three-Component Synthesis of Quinazolinones at Ambient Temperature Catalyzed by Silica Gel Supported Phosphomolybdic Acid.

ChemInform ◽  
2010 ◽  
Vol 41 (44) ◽  
pp. no-no
Author(s):  
Gowravaram Sabitha ◽  
N. Mallikarjuna Reddy ◽  
M. Nagendra Prasad ◽  
G. S. K. Raja ◽  
J. S. Yadav
Keyword(s):  
Ambient Temperature ◽  
Silica Gel ◽  
Phosphomolybdic Acid ◽  
Solvent Free ◽  
One Pot

HNO3/Silica Gel Supported CAN; Oxidative Deprotection of Benzylic Tetrahydropyranyl Ethers under Solvent-Free Conditions Using Microwaves.

ChemInform ◽  
2005 ◽  
Vol 36 (36) ◽  
Author(s):  
Majid M. Heravi ◽  
Pegah Kazemian ◽  
Hossein A. Oskooie ◽  
Mitra Ghassemzadeh
Keyword(s):  
Silica Gel ◽  
Solvent Free ◽  
Solvent Free Conditions

Silica gel induced cleavage of aziridines by aromatic amines under solvent free conditions

2002 ◽  
Vol 43 (22) ◽  
pp. 3975-3976 ◽  
Author(s):  
R.Vijaya Anand ◽  
Ghanshyam Pandey ◽  
Vinod K. Singh
Keyword(s):  
Silica Gel ◽  
Aromatic Amines ◽  
Solvent Free ◽  
Solvent Free Conditions
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