Aqueous [bmim][BF4] as green solvent in microwave-assisted organic reactions: clean synthesis of 1H-benzo[f]chromene derivatives

2006 ◽  
Vol 2006 (12) ◽  
pp. 776-778 ◽  
Author(s):  
Xin-Min Wen ◽  
Hui-Yun Wang ◽  
Shu-Ling Li
Keyword(s):  
Organic Reactions ◽  
Green Solvent ◽  
Microwave Assisted ◽  
Clean Synthesis

scholarly journals Ekstraksi Polifenol Total dari Daun Kadamba (Mitragyna speciosa Korth) Menggunakan Metode Choline Chloride-Sorbitol based Microwave Assisted Extraction

2019 ◽  
Vol 10 ◽  
pp. 131-134
Author(s):  
Ramila Hidayati ◽  
Dewi Rahmawati ◽  
Islamudin Ahmad
Keyword(s):  
Choline Chloride ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Green Solvent ◽  
Microwave Assisted ◽  
Extract Solution ◽  
Mitragyna Speciosa ◽  
Assisted Extraction ◽  
Total Extraction

This research was conducted to determine the influence of the use of the choline chloride-sorbitol based microwave assisted extraction (MAE) method against the total extraction of polyphenols from the leaf Kadamba (Mitragyna speciosa Korth). Simplisia extracted using solvent (green solvent) choline chloride-sorbitol with a ratio of 1:1; 1:2 and 1:3 g/g with sample and solvent ratio of 1:10 g/mL, microwave strength is 50% watt and performed for 10 minutes, the extract solution has been obtained and then done determination of total levels of polyphenols by using folin ciocalteu reagents and further measured its absorption with the UV-VIS spectrophotometer device at a wavelength of 770 nm. Based on the results of the study, obtained the levels of polyphenols from each comparison of solvent used against the sample of 334 mg of GAE/g samples (1:1 g/g solvent); 372 mg GAE/g samples (1:2 g/g solvents) and 299 mg of GAE/g samples (1:3 g/g solvents). Based on the results of the study can be concluded that the method of choline chloride-sorbitol based microwave assisted extraction (MAE) can be used to extract the polyphenols from Kadamba leaves easily, quickly and efficiently.

USE OF FACTORIAL DESIGN IN OPTIMIZATION OF MICROWAVE ASSISTED ORGANIC SYNTHESIS OF SOME AZOLES

INDIAN DRUGS ◽  
2018 ◽  
Vol 55 (10) ◽  
pp. 24-33
Author(s):  
R. R Somani ◽  
◽  
G. J. Sanap ◽  
P. K Chaskar
Keyword(s):  
Factorial Design ◽  
Organic Synthesis ◽  
Maximum Yield ◽  
Minimum Time ◽  
Organic Reactions ◽  
Design Approach ◽  
Environment Friendly ◽  
Microwave Assisted ◽  
Synthetic Reactions ◽  
32 Factorial Design

In the era of environment friendly chemistry, Microwave Assisted Organic Synthesis (MAOS) has proved to be an effective tool to achieve maximum yield in minimum time without compromising on quality. The present work focuses on synthesis of some bioactive heterocyclic azoles using MAOS. However, the synthetic reactions are optimized using a known technique of factorial designing. Here, 32 factorial design approach is used to achieve the set targets of yields and purity. The outcome has been very promising and opens up new avenues for organic chemists who face challenges in optimizing organic reactions.

Microwave‐Assisted Cu ‐Catalyzed Organic Reactions

2020 ◽  
pp. 119-151
Author(s):  
Bogdan Štefane ◽  
Helena Brodnik‐Žugelj ◽  
Uroš Grošelj ◽  
Jurij Svete ◽  
Franc Požgan
Keyword(s):  
Organic Reactions ◽  
Microwave Assisted

scholarly journals Microwave assisted synthesis of Knoevenagel Derivatives using water as green solvent

2020 ◽  
Vol 3 ◽  
pp. 100008 ◽  
Author(s):  
Ajmal R. Bhat ◽  
Mohd H. Najar ◽  
Rajendra S. Dongre ◽  
Mohammad S. Akhter
Keyword(s):  
Microwave Assisted Synthesis ◽  
Green Solvent ◽  
Microwave Assisted

scholarly journals Microwave Assisted Three Component Reaction Conditions to Obtain New Thiazolidinones with Different Heterocyclic Skeletons

Proceedings ◽  
2019 ◽  
Vol 41 (1) ◽  
pp. 38
Author(s):  
Fernando J. Lorenzo ◽  
Romina A. Ocampo ◽  
Sandra D. Mandolesi
Keyword(s):  
Microwave Irradiation ◽  
Thioglycolic Acid ◽  
Aldehyde Group ◽  
Green Solvent ◽  
Reaction Products ◽  
Reaction Conditions ◽  
One Pot ◽  
Microwave Assisted ◽  
Three Component Reaction ◽  
The One

We present here a new proposal for the “one pot” generation of new 4-thiazolidinones (9a–e) through a multicomponent reaction under microwave irradiation conditions, using aromatic and heteroaromatic amines (8a–e), absolute ethanol as a “green” solvent and modifying the aldehyde group in the glycosidic residue, synthesized from D-mannitol. The study is focused in the variation of the irradiation times and the concentration of thioglycolic acid in order to study the possibility of controlling the structure and/or stereochemistry of the products formed in the reaction. Thiazolidinones 9a–d were obtained with a 69–82% The generation of the corresponding reaction products were monitored by TLC and CG-MS, taking reaction aliquots. The conditions reaction proved to be chemoselective depending on the excess of acid and irradiation times.

ChemInform Abstract: Solvent-Free Microwave-Assisted Organic Reactions. Preparation of β-Keto Esters.

ChemInform ◽  
2010 ◽  
Vol 31 (34) ◽  
pp. no-no
Author(s):  
Massimo Gianotti ◽  
Giorgio Martelli ◽  
Giuseppe Spunta ◽  
Eileen Campana ◽  
Mauro Panunzio ◽  
...  
Keyword(s):  
Solvent Free ◽  
Organic Reactions ◽  
Keto Esters ◽  
Microwave Assisted

Microwave assisted organocatalytic synthesis of 5-hydroxymethyl furfural in a monophasic green solvent system

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 26714-26720 ◽  
Author(s):  
Hitesh Pawar ◽  
Arvind Lali
Keyword(s):  
Organic Solvents ◽  
Solvent System ◽  
Sulphonic Acid ◽  
Green Solvent ◽  
Hydroxymethyl Furfural ◽  
Microwave Assisted ◽  
System P

Monophasic microwave assisted dehydration of fructose to 5-hydroxymethyl furfural (HMF) catalyzed by p-toluene sulphonic acid (PTSA) was studied in non-aqueous organic solvents.

scholarly journals Ekstraksi Polifenol Total dari Herba Suruhan (Peperomia pellucida [L.] KUNTH) Menggunakan Metode Citric Acid-Glucose Based Microwave Assisted Extraction

2019 ◽  
Vol 10 ◽  
pp. 76-80
Author(s):  
Duwi Meiliyani ◽  
Sabaniah ◽  
Islamudin Ahmad
Keyword(s):  
Citric Acid ◽  
Extraction Method ◽  
Microwave Assisted Extraction ◽  
Green Solvent ◽  
Liquid Ratio ◽  
Extraction Condition ◽  
Total Polyphenols ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Solid Liquid

This study aims to determine the effect of citric acid-glucose based microwave assited extraction (MAE) method on total polyphenols content from (Peperomia pellucida [L.] Kunth) herbs. Dried samples were extracted using green solvent glucose citric acid with a ratio of 1: 1 g/g, 3: 1 g/g, and 5: 1 g/g, respectively, 30% microwave power for 5 minutes, and 1:5 g /mL solid-liquid ratio. Then the obtained extract solution was performed determination total polyphenols content using Folin-Ciocalteu reagent, and the absorbance was measured using a UV-Vis spectrophotometer at 791 nm. Based on the results, obtained total polyphenols content according to the extraction condition namely 214.405 mg GAE/g sample (3: 1 g /g solvent), 84.833 mg GAE /g sample (1: 1 g /g solvent) and 53,9451 mg GAE/g sample (5: 1 g /g solvent), respectively. This study is a preliminary data about the use of citric acid-glucose based microwave assisted extraction method on total polyphenols content from this plant quickly, easily and efficiently.

Sign in / Sign up

Export Citation Format

Share Document