The physical properties of alkenes and alkynes are generally similar to those of alkanes or cycloalkanes with equal numbers of carbon atoms. (britannica.com)
For example: Alkaline potassium permanganate or acidified potassium dichromate are oxidising alcohols to acids, that is, adding oxygen to the starting material. (omtex.co.in)
Alcohols1
The isomerization reaction proceeds for straight-chain alkynes and acetylinic alcohols. (wikipedia.org)
Azides and alkynes2
Through these improvements the method became more synthetically practical and increased the reaction substrate scope to include unreactive azides and alkynes. (fsu.edu)
Genazzani, A. A. Click Chemistry Reactions in Medicinal Chemistry: Applications of the 1,3-dipolar Cycloaddition between Azides and Alkynes. (aksci.com)
Sodium8
Observation: The presence of an alcoholic group can be confirmed by the addition of a few drops of sodium or potassium hydroxide to the compound, followed by the addition of a few drops of iodine solution. (pracnow.com)
Due to having low atomic mass and large atomic radius, sodium is third-least dense of all elemental metals and is one of only three metals that can float on water, the other two being lithium and potassium. (hpchemicals.com)
Sodium reacts with alcohol and gives alkoxides, and when sodium is dissolved in ammonia solution, it can be used to reduce alkynes to trans-alkenes. (hpchemicals.com)
though potassium is the better ion in most cases, sodium is chosen for its lower price and atomic weight. (hpchemicals.com)
8. manufacture of various chemicals as sodium cyanide, potassium metal, titanium sponge, sodium peroxide etc. (hpchemicals.com)
Reduction of alkynes and benzene rings by solutions of sodium or lithium in liquid ammonia have been described. (thevespiary.org)
This will produce 100 mL of PBS solution containing: Sodium chloride (137 mM), Potassium chloride (2.7 mM), Phosphate buffer (11.9 mM). (tocris.com)
Trans-alkenes1
This reaction, which is called the Birch Reduction, is related to the reduction of alkynes to trans-alkenes. (thevespiary.org)
Terminal8
The alkyne zipper reaction is an organic reaction that involves isomerization of a non terminal alkyne into a terminal alkyne. (wikipedia.org)
These steps will be repeated, essentially moving the alkyne along the alkane chain until a terminal alkyne is achieved. (wikipedia.org)
Once a terminal alkyne is achieved, the 3-aminopropylamine anion will attack and remove the terminal proton. (wikipedia.org)
The second chapter describes a method for the preparation of 5-iodo-1,2,3-triazoles directly from organic azides and terminal alkynes. (fsu.edu)
The method described in Chapter 3 is a simple and rapid process for the synthesis of bistriazoles from organic azides and terminal alkynes under oxidative conditions ( oxygen atmosphere) with a broad substrate scope. (fsu.edu)
Thus, acetylenes are converted regio- and stereoselectively in moderate yields into E -1,4-dienes by palladium-catalyzed coupling of allylic substrates with alkenylpentafluorosilicates, which are derived by hydrosilylation of a terminal alkyne and subsequent treatment with potassium fluoride. (thieme.com)
This reaction can be followed by a palladium-catalyzed coupling, providing a one-pot procedure for the overall coupling between a bromoarene (or chloroarene) and a terminal alkyne ( Scheme 29 ). (thieme.com)
https://doi.org/10.1021/acscentsci.9b00330]] #ref(Takeda_ACSCS_2019.jpg,center,70%) -Pyridine-Based Organocatalysts for Regioselective '''syn'''-1,2-Silaboration of Terminal Alkynes and Allenes --Yohei Morimasa, Kosuke Kabasawa, Toshimichi Ohmura, and Michinori Suginome --'''Asian J. Org. (kyoto-u.ac.jp)
Cycloaddition2
This dissertation describes the development of alternative products from the copper-catalyzed azide-alkyne cycloaddition (CuAAC). (fsu.edu)
Chapter 5 summarizes the work conducted on modifying the conditions applied to the copper catalyzed azide alkyne cycloaddition (CuAAC). (fsu.edu)
Ethers2
Inverse electron-demand Diels-Alder additions (iEDDA) between 1,2,4,5-tetrazines and suitable unsaturated dienophiles such as olefins, alkynes, or enol ethers provide facile access to pyridazines. (springer.com)
Herein we wish to report the use of cyclic enol ethers as the dienophile in iEDDA reactions with tetrazines for preparing pyridazines with 2-hydroxyethyl or 3-hyproxypropyl substituents in 4-position of the pyridazine ring as an alternative for hitherto used alkynes (Scheme 1 ). (springer.com)
Carbonate2
The subsequent employment of potassium carbonate in the CuAAC, afforded the desired bistriazoles with moderate to high selectivity over 1,4-disubstituted-1,2,3-triazoles. (fsu.edu)
The competitive catalytic hydrogenation of 2-octyne and 1-heptene in methanol has been studied on catalysts 3% Pd on activated carbon and Pd black, modified with ammonium chloride, potassium chloride, potassium carbonate, or calcium carbonate. (cas.cz)
Synthesis1
It is commonly used in the synthesis of alkenes, alkynes, and other organic compounds, as well as in the preparation of Grignard reagents. (vasista.co.in)
Hydrosilylation1
Jillian Buriak and Matthew Allen report a mild and general approach for covalent modification of the surface through ethyl aluminum dichloride mediated hydrosilylation of alkynes and alkenes. (laserfocusworld.com)
Oxidation1
Alkynes have similar reactivity to alkenes and are able to undergo halogenations, hydrogenations, and oxidation. (ukessays.com)
Hydrogen2
The 3-aminopropylamine anion attacks the same lesser-substituted carbon adjacent to the allene, removing a proton and catalyzing a similar process, where the electrons from the carbon-hydrogen bond move to form a triple-bond (an alkyne). (wikipedia.org)
However, the process stops there because the carbon-hydrogen bond electrons cannot form an additional pi-bond on top of the alkyne. (wikipedia.org)
Hydroxide1
The researchers showed that porous silicon functionalized with hydrophobic groups was able to withstand boiling aerated water and potassium hydroxide with a pH of 10. (laserfocusworld.com)
Reactions1
36 ] In a different approach, ruthenium-catalyzed Alderene reactions of (benzyldimethylsilyl)alkynes with alkenes afford benzyldimethylsilyl-substituted 1,4-dienes, which can be further elaborated by cross-coupling reactions. (thieme.com)
Reaction3
HO-CH2C≡C-(CH2)6CH3 → HO(CH2)8-C≡CH The alkyne zipper reaction requires a strong base, which can be generated from the reaction of potassium hydride and a diamine: The potassium 3-aminopropylamide deprotonates the less-substituted methylene adjacent to the alkyne group. (wikipedia.org)
AK Scientific stocks unique alkynes and azides AMT, suited both for the Huisgen click reaction and for Suzuki coupling. (aksci.com)
palladium supported on charcoal is used as the catalyst, and the reaction, in the presence of a base and with potassium iodide as iodide source, constitutes a copper- and ligand-free alternative to the standard Sonogashira protocols. (thieme.com)
Selectivity1
The methodological enhancements of the procedure described in Chapter 2 provides high conversion as well as high iodo/protio selectivity through the reduction in equivalents of alkyne, and employment of [Tri(1-benzyl-1H-1,2,3-triazol-4-yl)methyl]amine (TBTA). (fsu.edu)
Chlorine1
5. How many moles of HCl will be required to react with potassium heptaoxodichromate (V1) to produce 3 moles of chlorine? (smilehopego.com)
Triple-bond1
Alkynes are hydrocarbons with functional groups of at least one carbon-carbon triple bond. (ukessays.com)
Base1
The base used by Brown and Yamashita was potassium 1,3-diaminopropanide, generated in situ by adding potassium hydride to the solvent 1,3-diaminopropane. (wikipedia.org)