updated Wed. December 6, 2023
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WhaTech
January 31, 2018
The main purpose of stimulation is to increase the productivity of oil and gas industry by improving the flow of hydrocarbons (an organic compound consisting entirely of hydrogen and carbon such as alkanes, alkenes, cycloalkanes and alkyne-based compounds) from drainage area to the well bored for theÃÂ ...
Science Daily
January 22, 2018
"Using X-ray spectroscopy measurements at the electron storage ring BESSY II of the Helmholtz-Zentrum Berlin, we were able to decipher how iodine splits from the starting product, hydrogen atoms move to new positions and the alkyne groups capture the silver atom," explains lead author Yi-Qi Zhang.
Science Daily
January 15, 2018
The current scope is, however, limited to internal alkynes (1,2-disubstituted acetylenes), and the present reaction entails internal side groups in the conjugated tetraenes. However, facile detachment of some side groups is possible to give the linear conjugated polyenes and this protocol will be disclosed inÃÂ ...
Science Trends
December 28, 2017
Functionalized cyclopropyl alkynes are excellent substrates for gold-catalyzed transformations. Thus, seven-membered heterocycles such as oxepin-2-ones, azepin-2-ones (or azepin-2,5-diones) can be efficiently prepared from 2-methoxy-2-alkynylcyclopropane-carboxylic acids or –carboxamides.
Digital Journal
December 15, 2017
New York, NY -- (SBWIRE) -- 12/15/2017 -- According to a new market report published by Persistence Market Research, titled "Global Market Study on Pyridine: Increasing Demand for Synthetic Pyridine to Drive Growth During Forecast Period 2015 -2025 ", the global pyridine market is estimated to reach US$ 1,741.4 MnÃÂ ...
Phys.Org
October 20, 2017
C-H bond functionalisation refers to the substitution of the hydrogen atom in the C-H bond with another functional group, such as an alkene, alkyne, ... Prof Wu said, "The products formed from this new process cannot be obtained directly through other synthetic means using alkynes as the starting material.
Phys.Org
July 18, 2017
The researchers report that their technique speeds up the process used for discovering useful new reactions by a factor of three by automating some of the time-consuming steps. They claim it works as advertised, noting that they used it to discover a three-component, nickel-catalyzed diarylation of alkynes.
Phys.Org
July 6, 2017
As a model reaction, Fang et al. used cyclododecyne, an internal alkyne, and tried various low-molecular weight aliphatic acid chlorides as their donor ... Several of the internal alkynes that they investigated only required a little more than one equivalent of butyryl chloride and produced the desired acidÃÂ ...
Cowra Guardian
May 21, 2017
Pay attention students: a very unique class was in session at Cowra High School on Friday morning as students had a chance to participate in a groundbreaking science program. Cowra High School is one of only eight schools in the country and the only one in regional Australia to be chosen to take part inÃÂ ...
Chemistry World
April 28, 2017
Carbon–carbon triple bonds are well known and π complexes formed between alkyne groups and coinage metals are exploited regularly in organic synthesis and catalysis. Far rarer are non-carbon analogues of the alkynes bound through π bonds to copper and its chemical cousins. Platinum andÃÂ ...
Nature.com
March 7, 2017
The benzene rings are also shared by two other groups pointing towards the centre of the squares and ending with a reactive alkyne moiety. The structure alternates these layers with sacrificial ones being analogously constructed — the only difference being that the alkynes are replaced by inert methyls.
The Sarnia Journal
February 26, 2017
Annabelle Rayson, left, and Lanna Iacobelli, both 11-year-old students at St. Anne elementary, are seen here with their winning project at last year's Lambton County Science fair. Submitted Photo. Troy Shantz. Annabelle Rayson has figured out what's happening to the world's oceans. She and her Grade 5ÃÂ ...
Phys.Org
October 13, 2016
Strategies for catalytic alkyne hydroarylation and the resulting regiochemistry. Credit: (c) Nature Chemistry (2016). DOI: 10.1038/nchem.2602. (Phys.org)—One chemically relevant reaction is alkyne hydroarylation, or the addition of an alkyne to an arene to form aryl-substituted arenes. However, most routesÃÂ ...
Digital Journal
November 22, 2017
The low molecular weight materials which are formed by polymerization of alkenes, alkynes and aromatic compounds acquired from the cracking of heavy carbon feedstock are called petroleum resins. It has various significant properties such as softening point, solubility and chemical as well as thermal resistance. It is used ...
Phys.Org
November 15, 2017
X-ray diffraction analysis of one of the compounds described in the article. Credit: Tatiana Borisova. RUDN University chemists have synthesized new isoquinoline derivatives. Due to their biological activity, these compounds have applications in new drugs, including antispasmodics and bactericidal agents ...
Odisha Television Ltd.
November 15, 2017
Physical properties of alkenes and alkynes (boiling points, density and dipole moments); Acidity of alkynes; Acid catalysed hydration of alkenes and alkynes (excluding the stereochemistry of addition and elimination); Reactions of alkenes with KMnO4 and ozone; Reduction of alkenes and alkynes;Â ...
Phys.Org
November 8, 2017
Selective hydrogenation is the key to producing valuable chemicals, for example, turning triple-bonded hydrocarbons called alkynes selectively into double-bonded alkenes—starting materials for the synthesis of plastics, fuels and other commercial products. "Understanding how molecular hydrogen ...
Phys.Org
November 6, 2017
Their decomposition in water leads to the formation of the desired compounds. The transformations discovered by RUDN University scientists may be used to develop methods for preparation of vinylphosphonate derivatives from terminal alkynes (carbons with a triple bond at the ends of the molecule), ...
Times Now
November 6, 2017
Preparation, properties and reactions of alkenes and alkynes: Physical properties of alkenes and alkynes (boiling points, density and dipole moments); Acidity of alkynes; Acid catalysed hydration of alkenes and alkynes (excluding the stereochemistry of addition and elimination); Reactions of alkenes with ...
3DPrint.com
November 2, 2017
In addition, 3D-printed millifluidic devices with catalytically active copper carboxylate complexes were used to promote azide–alkyne cycloaddition under flow conditions. The importance of controlling the 3D architecture of the millifluidic devices was evidenced by enhancing reaction conversion upon ...
Cowra Guardian
May 21, 2017
Pay attention students: a very unique class was in session at Cowra High School on Friday morning as students had a chance to participate in a groundbreaking science program. Cowra High School is one of only eight schools in the country and the only one in regional Australia to be chosen to take part in ...
Science Magazine (blog)
August 11, 2017
... reported bromodomain compounds and added short chemical tags to them to participate in click reactions – either the classic azide/alkyne,ÃÂ ...
R & D Magazine
July 28, 2017
First up is a reaction called the copper-catalyzed azide-alkyne cycloaddition (CuAAC) click polymerization. This reaction is facilitated by copper,ÃÂ ...
Phys.Org
July 28, 2017
First up is a reaction called the copper-catalyzed azide-alkyne cycloaddition (CuAAC) click polymerization. This reaction is facilitated by copper,ÃÂ ...
The Hindu
July 22, 2017
The azide and alkyne fragments that are capable of binding to the adjacent sites of the G-quadruplex react with each other to produce triazoleÃÂ ...
Green Mountain Outlook
July 20, 2017
Magnetic Poly Two Alkyne Derivatives Market report covers detailed competitive outlook including the market share and company profiles ofÃÂ ...
MTNV
July 18, 2017
... it to discover a three-component, nickel-catalyzed diarylation of alkynes. ... Using this method, we discovered an alkyne hydroallylation and aÃÂ ...
Nature.com
March 7, 2017
... towards the centre of the squares and ending with a reactive alkyne moiety. ... Steric arguments dictate that, out of the four alkynes pointingÃÂ ...
The Sarnia Journal
February 26, 2017
Annabelle Rayson, left, and Lanna Iacobelli, both 11-year-old students at St. Anne elementary, are seen here with their winning project at lastÃÂ ...
Phys.Org
October 13, 2016
(Phys.org)—One chemically relevant reaction is alkyne hydroarylation, or the addition of an alkyne to an arene to form aryl-substituted arenes.
The Biological SCENE
February 19, 2017
They are developing a line of "ecocatalysts" based on the metal salts and have been testing them for possible commercial application in a range of reactions, such as manganese reductive amination of ketones and copper-catalyzed azide-alkyne clickÃÂ ...
The Biological SCENE
February 15, 2017
DBCO's alkyne group undergoes a selective click-chemistry reaction with azides, thus recruiting the conjugated drug selectively to azide-decorated cancer cells.
Genetic Engineering & Biotechnology News
February 14, 2017
The azide of pAMF enables chemoselective click chemistry with a corresponding PL bearing a strained alkyne. Although homogenous ADCs are on the horizon, bioconjugation of mAb amines or mAb thiols remains a common approach.
BioTechniques.com
February 14, 2017
Two complementary approaches are currently used for assaying protein S-palmitoylation: acyl-exchange (6) and alkyne fatty acid labeling (7).
Genetic Engineering & Biotechnology News
February 3, 2017
Dr. Yu's team showed that they can use the ligands to add aryl, alkene, and alkyne functional groups, common building blocks in the construction of drug molecules.
Digital Journal
January 30, 2017
New York, NY -- (SBWIRE) -- 01/30/2017 -- According to a new market report published by Persistence Market Research, titled "Global Market Study on Pyridine: Increasing Demand for Synthetic Pyridine to Drive Growth During Forecast Period 2015 -2025 "ÃÂ ...
Dove Medical Press
January 15, 2017
Derivatization of liposomal surface with targeting peptides is achieved using the postmodification method: the alkyne-peptide derivative Pra-KCCYSL reacts, through click chemistry procedures, with a synthetic surfactant modified with 1, 2, or 4 azido ...
Medgadget (blog)
January 12, 2017
The report, named Global LAA (linoleamide alkyne) Market, provides a Detailed overview of the LAA (linoleamide alkyne) Industry related to overall world. Report assesses the size of the LAA (linoleamide alkyne) market and also estimates the valuation ...
Digital Journal
November 10, 2016
The most commonly used reactions for pyridine synthesis are Chichibabin synthesis, Boennemann cyclization, and Cobalt-catalyzed alkyne-nitrile cyclotrimerization, etc. Request Report Sample @ http://www.persistencemarketresearch.com/samples/3521
Digital Journal
November 3, 2016
... sodium amide with water to substantially lower the overall temperature of the entire process of indigo dye production. Furthermore, sodium amide acts as a drying reagent for dehydrating ammonia gas and deprotonation of alkynes, weak acids, alcohols ...
GenomeWeb
October 13, 2016
To address this problem, Johnson and his colleagues turned to a chemoproteomic approach, using a photo-activated probe consisting of a BACE1 inhibitor under investigation at Pfizer linked to an alkyne group that could attach via click chemistry to anÃÂ ...
Phys.Org
October 13, 2016
Groups from North Dakota State University and the University of California at Berkeley have devised a catalyst to exact a tandem reaction in which benzoic acid, as their model arene, is used to promote metal-mediated ortho-directing alkyne ...
Nanowerk
October 7, 2016
Arylethynyl-substituted PAHs are readily accessible by the Sonogashira coupling, which is a cross-coupling reaction to form carbon-carbon bonds between an alkyne and a halogen-substituted aromatic compound. The synthesis of thiophene-fused PAHs canÃÂ ...
Medgadget (blog)
September 27, 2016
pmr-logo11 According to a new market report published by Persistence Market Research, titled "Global Market Study on Pyridine: Increasing Demand for Synthetic Pyridine to Drive Growth During Forecast Period 2015 -2025 ", the global pyridine market isÃÂ ...
Royal Society of Chemistry
September 23, 2016
It is most often used to create ring structures from alkenes and alkynes (molecular structures that include double and triple bonds between carbon atoms).
Digital Journal
September 1, 2016
Azide beads, or azide magnetic beads, are a biotin/streptavidin-free tool for capturing alkyne-tagged biomolecules onto magnetic beads via the Cu(I)-catalyzed click reaction.
Phys.Org
September 1, 2016
Among the molecules which will be used in the project are alkenes and alkynes. An alkene is a hydrocarbon having one carbon-carbon double bond, such as ethylene and propylene.
nanotechweb.org
August 26, 2016
... artificial amino acid. They then refolded the chain to make an engineered pore (the nanoreactor). The researchers used their nanoreactor to perform "click chemistry" in which an azide reacts with an alkyne in a copper(I)-catalyzed reaction to form ...
Science Daily
August 11, 2016
The organic layer behaves as a tight protective umbrella protecting dots from direct influence of the copper ions," says Dr. Grala and clarifies: "We carried out click reaction known as alkyne-azide cycloaddition, in which we used a copper(l) compound ...
GenomeWeb
August 3, 2016
"It will be possible to label distinct biomolecules in a single sample with azides or alkynes and cyclopropenes, and selectively and independently enrich and identify each population of labeled biomolecules," the authors wrote.
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