Efficient Palladium(II) Catalysis under Air. Base-Free Oxidative Heck Reactions at Room Temperature or with Microwave Heating

2007 ◽  
Vol 72 (21) ◽  
pp. 7957-7962 ◽  
Author(s):  
Jonas Lindh ◽  
Per-Anders Enquist ◽  
Åke Pilotti ◽  
Peter Nilsson ◽  
Mats Larhed
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Heck Reactions

ChemInform Abstract: Efficient Palladium(II) Catalysis under Air. Base-Free Oxidative Heck Reactions at Room Temperature or with Microwave Heating.

ChemInform ◽  
2008 ◽  
Vol 39 (8) ◽  
Author(s):  
Jonas Lindh ◽  
Per-Anders Enquist ◽  
Aake Pilotti ◽  
Peter Nilsson ◽  
Mats Larhed
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Heck Reactions

Methylation of Phenolic Hydroxyl Group and Demethylation of Anisoles

2009 ◽  
Vol 2009 (4) ◽  
pp. 229-230 ◽  
Author(s):  
Nobuhiro Sato ◽  
Hiroyuki Endo
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Reverse Reaction ◽  
Phenolic Hydroxyl ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Phenolic Hydroxyl Groups ◽  
Phenyl Ethers ◽  
Methyl Phenyl

A mild methylation of phenolic hydroxyl groups with iodomethane was enabled in the presence of sodium bis(trimethylsilyl)amide at room temperature. The reverse reaction, namely demethylation of methyl phenyl ethers, was easily achieved by microwave heating with neat iodotrimethylsilane.

Heck reactions catalyzed by Pd(0)-PVP nanoparticles under conventional and microwave heating

2011 ◽  
Vol 408 (1-2) ◽  
pp. 47-53 ◽  
Author(s):  
Daniela de L. Martins ◽  
Heiddy M. Alvarez ◽  
Lúcia C.S. Aguiar ◽  
Octavio A.C. Antunes
Keyword(s):  
Microwave Heating ◽  
Heck Reactions

scholarly journals Phenylboronic Acid/CuSO4 as an Efficient Catalyst for the Synthesis of 1,4-Disubstituted-1,2,3-Triazoles from Terminal Acetylenes and Alkyl Azides

2017 ◽  
Vol 59 (2) ◽  
Author(s):  
Heraclio López-Ruiz
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Phenylboronic Acid ◽  
Terminal Alkynes ◽  
Efficient Catalyst ◽  
Alkyl Azides ◽  
Terminal Acetylenes

<p>The synthesis of 1,4-disubstituted-1,2,3-triazoles from alkyl azides and terminal alkynes at room temperature and under microwave heating was attained using Cu(I), generated <em>in-situ </em>from copper(II) sulfate and phenylboronic acid, as catalyst. Twelve new triazoles were obtained in moderate to good yields (53-98%), and the products were obtained by crystallization from the mixture reaction without further purification.</p>

scholarly journals Metal-Assisted and Microwave-Accelerated Germination

2019 ◽  
Author(s):  
Kadir Aslan ◽  
Monet Stevenson ◽  
Janelle Guy ◽  
Enock Bonyi ◽  
Muzaffer Mohammed ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Experimental Conditions ◽  
Plant Seed ◽  
Au Nps ◽  
Plant Seeds ◽  
Combined Use ◽  
Accelerated Growth ◽  
20 Nm ◽  
Hydroponic Growth

ABSTRACTWe report the proof-of-principle demonstration of a methodology, called Metal-Assisted and Microwave-Accelerated Germination, to modulate the germination of plant seeds and growth of plants using gold nanoparticles (Au NPs) and microwave heating. As a model plant seed, basil seeds were heated in a solution of 20 nm Au NPs using a microwave waveguide fiber connected to a solid-state microwave operating at 8 GHz at 20 W, which resulted in the development of longer basil gum as observed by optical microscopy. In control experiments, Au NPs or microwave heating was omitted to establish a baseline growth level under standard experimental conditions (no microwave heating or no Au NPs). Our results also show that hydroponic growth and soil growth of basil plants can be delayed with the use of 20 nm Au NPs at room temperature without microwave heating. The combined use of 20 nm Au NPs and microwave heating at 10 W for 6 minutes results in accelerated growth prolonged life of basil plants.

Influence of Curing on Calcined Kaolin-Based Geopolymer

2016 ◽  
Vol 690 ◽  
pp. 200-205
Author(s):  
Narumon Lertcumfu ◽  
Sukum Eitssayeam ◽  
Kamonpan Pengpat ◽  
Tawee Tunkasiri ◽  
Denis Russell Sweatman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Portland Cement ◽  
Microwave Heating ◽  
Production Line ◽  
Room Temperature ◽  
Ordinary Portland Cement ◽  
Microwave Curing ◽  
Alternative Material ◽  
Calcined Kaolin

The object of this work was to use calcined kaolin-based geopolymer as an alternative material to replace ordinary Portland cement (OPCs) by applying geopolymerization processes. Geopolymer slurry was prepared from calcined kaolin and alkali activators, which consisted of 10 M NaOH and Na2SiO3 solution. The fresh slurry was cast into plastic molds and then cured at room temperature for 24 h. Reaction temperatures were measured (for 24 hours after casting). Compressive strength of the geopolymer was tested after curing at room temperature and after microwave heating. The mechanical properties increased with added plaster for microwave curing of 5 min. It is believed that this process can increase the efficiency of the production line for geopolymer.

Open-Air Oxidative Heck Reactions at Room Temperature.

ChemInform ◽  
2006 ◽  
Vol 37 (34) ◽  
Author(s):  
Per-Anders Enquist ◽  
Jonas Lindh ◽  
Peter Nilsson ◽  
Mats Larhed
Keyword(s):  
Room Temperature ◽  
Heck Reactions

scholarly journals Cover Picture: Continuous‐Flow Suzuki‐Miyaura and Mizoroki‐Heck Reactions under Microwave Heating Conditions (Chem. Rec. 1/2019)

2019 ◽  
Vol 19 (1) ◽  
pp. 1-1 ◽  
Author(s):  
Yasunari Monguchi ◽  
Tomohiro Ichikawa ◽  
Tsuyoshi Yamada ◽  
Yoshinari Sawama ◽  
Hironao Sajiki
Keyword(s):  
Microwave Heating ◽  
Continuous Flow ◽  
Heck Reactions
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