organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond. The simplest acyclic alkynes with only one triple...
21 KB (2,694 words) - 15:06, 25 July 2024
The azide-alkyne Huisgen cycloaddition is a 1,3-dipolar cycloaddition between an azide and a terminal or internal alkyne to give a 1,2,3-triazole. Rolf...
21 KB (2,639 words) - 20:31, 22 July 2024
Alkyne metathesis is an organic reaction that entails the redistribution of alkyne chemical bonds. The reaction requires metal catalysts. Mechanistic studies...
13 KB (1,309 words) - 02:51, 30 November 2023
An alkyne trimerisation is a [2+2+2] cycloaddition reaction in which three alkyne units (C≡C) react to form a benzene ring. The reaction requires a metal...
18 KB (1,925 words) - 02:15, 18 April 2024
copper-catalyzed reaction of an azide with an alkyne to form a 5-membered heteroatom ring: a Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC). The first triazole...
48 KB (5,450 words) - 20:27, 26 August 2024
organometallic chemistry, a transition metal alkyne complex is a coordination compound containing one or more alkyne ligands. Such compounds are intermediates...
8 KB (935 words) - 04:18, 13 May 2024
Glaser coupling (redirect from Alkyne coupling)
+ O2 → 2PhC2C2Ph + 2Cu2O In the related Eglinton reaction two terminal alkynes are coupled by a copper(II) salt such as cupric acetate. 2 R − ≡ − H →...
5 KB (587 words) - 15:31, 5 June 2024
(alkanes), or unsaturated, with double bonds (alkenes) or triple bonds (alkynes). If other elements (heteroatoms) are bound to the carbon chain, the most...
5 KB (297 words) - 05:18, 11 December 2023
and some alkynes also undergo polymerization by opening of the multiple bonds to produce polyethylene, polybutylene, and polystyrene. The alkyne acetylene...
24 KB (2,586 words) - 20:12, 5 September 2024
The alkyne zipper reaction is an organic reaction that involves isomerization of a non terminal alkyne into a terminal alkyne. This reaction was first...
4 KB (478 words) - 22:29, 27 September 2024
Frustrated Lewis pair (section Alkyne hydrogenation)
hydridoborate ionic complex. Metal free hydrogenation of unactivated internal alkynes to cis-alkenes is readily achieved using FLP-based catalysts. The condition...
23 KB (2,669 words) - 14:31, 20 September 2024
on alkynes. Again the mode of action is syn and secondary reaction products are aldehydes from terminal alkynes and ketones from internal alkynes. In...
8 KB (942 words) - 15:12, 8 July 2024
magnesium and the alkyne Me3SiC2SiMe3, in THF. This synthesis was immediately used to make other similar titanocene and zirconocene alkyne complexes. Under...
45 KB (4,275 words) - 15:20, 18 September 2024
Acetylene (category Alkynes)
formula C2H2 and structure H−C≡C−H. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block...
45 KB (4,385 words) - 03:29, 19 September 2024
Dicobalt octacarbonyl (section Reactions with alkynes)
whereby an alkoxy group located on the α-carbon of an alkyne is replaced by another nucleophile. The alkyne reacts first with dicobalt octacarbonyl, from which...
20 KB (1,669 words) - 17:18, 4 July 2024
Larock indole synthesis (section Alkynes)
catalyst to synthesize indoles from an ortho-iodoaniline and a disubstituted alkyne. It is also known as Larock heteroannulation. The reaction is extremely...
10 KB (1,203 words) - 03:15, 2 September 2023
Phenylacetylene is an alkyne hydrocarbon containing a phenyl group. It exists as a colorless, viscous liquid. In research, it is sometimes used as an analog...
5 KB (366 words) - 19:33, 24 August 2023
with various forms of lead or sulfur. It is used for the hydrogenation of alkynes to alkenes (i.e. without further reduction into alkanes). It is named after...
3 KB (387 words) - 01:08, 28 August 2024
In organic chemistry, a cycloalkyne is the cyclic analog of an alkyne (−C≡C−). A cycloalkyne consists of a closed ring of carbon atoms containing one or...
13 KB (1,558 words) - 14:21, 5 September 2024
Enyne (redirect from Conjugated alkyne)
(alkyne). It is called a conjugated enyne when the double and triple bonds are conjugated. The term is a contraction of the terms alkene and alkyne. The...
2 KB (129 words) - 05:41, 13 August 2024
ways in which substituent molecules can be added to an alkene (R2C=CR2) or alkyne (RC≡CR). The concepts of syn and anti addition are used to characterize...
8 KB (546 words) - 15:38, 9 August 2024
only works with acetylene itself or with simple alkynes due to poor regioselectivity. From a terminal alkyne 7 isomers are possibly differing in the position...
12 KB (1,282 words) - 05:43, 10 June 2024
catalyzed by the enzyme acetylcholinesterase, beginning with an azide and an alkyne. He discovered several chemical reactions which have transformed asymmetric...
13 KB (1,022 words) - 18:26, 2 July 2024
propene and argentum, which refers to the typical reaction of the terminal alkynes with silver salts. The term homopropargylic designates in the same manner...
2 KB (159 words) - 08:27, 3 February 2023
series of chemical reactions designed to transform an aldehyde into an alkyne.[1][2][3] The formation of the 1,1-dibromoolefins via phosphine-dibromomethylenes...
5 KB (432 words) - 14:03, 26 September 2024
Conia-ene reaction (section Alkyne activation)
reaction between an enolizable carbonyl such as an ester or ketone and an alkyne or alkene, giving a cyclic product with a new carbon-carbon bond. As initially...
15 KB (1,805 words) - 22:19, 27 September 2024
aldehyde-alkyne-amine reaction), coined by Prof. Chao-Jun Li of McGill University, is a type of multicomponent reaction involving an aldehyde, an alkyne and...
6 KB (849 words) - 22:20, 27 September 2024
first developed by Carolyn Bertozzi as an activated variant of an azide alkyne Huisgen cycloaddition, based on the work by Karl Barry Sharpless et al....
44 KB (5,098 words) - 05:29, 19 February 2024
1-Butyne (category Alkynes)
compound with the formula CH3CH2C≡CH. It is a terminal alkyne. The compound is a common terminal alkyne substrate in diverse studies of catalysis. It is a...
3 KB (179 words) - 19:05, 5 January 2024
alkyne and a haloalkyne catalyzed by a copper(I) salt such as copper(I) bromide and an amine base. The reaction product is a 1,3-diyne or di-alkyne....
3 KB (293 words) - 16:22, 10 July 2024