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  • Aldehydes
  • InCl 3 and (Cy)( i -Pr)NH efficiently promote the carbocyclization reaction of α-disubstituted aldehydes to give functionalized cyclopentanes in very good yields through a combination of enamine-type catalysis with an indium-catalyzed activation of alkynes. (organic-chemistry.org)
  • The reaction mechanism for the palladium and amine cocatalyzed carbocyclization of aldehydes with alkynes has been investigated by means of density functional theory calculations and experiments. (diva-portal.org)
  • Alkynes can be prepared from aldehydes using the Corey-Fuchs reaction and from aldehydes or ketones by the Seyferth-Gilbert homologation . (chemeurope.com)
  • Barluenga's reagent (IPy 2 BF 4 , Py = pyridine) treated with HBF 4 efficiently catalyzes the inter- and intramolecular alkyne-carbonyl metathesis of unactivated alkynes with aldehydes or ketones, most of which proceed at room temperature. (rsc.org)
  • molecule
  • Subsequent transfer of hydrogen to the adsorbed alkyne proceeds slowly, relative to the corresponding hydrogen transfer to an adsorbed alkene molecule. (msu.edu)
  • The alkyne-tagged molecule is imaged using Raman microscopy that detects the strong Raman signal from the CC triple bond stretching vibration (~2120 cm -1 ). (spie.org)
  • Being unsaturated, alkynes undergo addition reactions to form alkene derivatives with the addition of one molecule and saturated compounds with the addition of two molecules. (assignmenthelp.net)
  • Masanobu Uchiyama and Ryo Takita from the RIKEN Center for Sustainable Resource Science and researchers from the University of Tokyo have now devised a method for selectively adding boron atoms to opposite sides of an alkyne molecule. (phys.org)
  • When additional atomic groups are added to an organic compound such as an alkyne, which has two carbon -carbon triple bond sites, the added groups can attach to the triple bond sites such that they are oriented to one side of the molecule to form what is known as a cis configuration, or oriented in opposite directions to afford a trans structure. (phys.org)
  • Cycloaddition
  • CF® dye alkyne reacts with azide to form 1,2,3-triazole by copper(I) catalyzed 1,3-dipolar Huisgen cycloaddition. (biotium.com)
  • CF® dye picolyl azide reacts with alkyne to form 1,2,3-triazole by 1,3-dipolar Huisgen cycloaddition through the use of a much lower copper (I) concentration without sacrificing reaction efficiency. (biotium.com)
  • The in situ formation mechanisms of active Ni-carboryne species ( COM1 ) and subsequent alkene/alkyne Ni-C bond insertion priorities, as well as relevant cycloaddition regioselectivities and kinetics, were investigated using the IDSCRF-B3LYP density functional theory (DFT) method, and all atoms were equitably treated at the DGDZVP level. (rsc.org)
  • atoms
  • The parent name of the alkyne comes from the IUPAC name for the alkane of the same number of carbon atoms, except the ‐ ane ending is changed to ‐ yne to signify the presence of a triple bond. (cliffsnotes.com)
  • 3. The position of the triple bond is indicated by placing the lower of the pair of numbers assigned to the triple‐bonded carbon atoms in front of the name of the alkyne. (cliffsnotes.com)
  • Alkynes are hydrocarbons that have at least one triple bond between two carbon atoms, with the formula C n H 2n-2 . (chemeurope.com)
  • Figure 1: The three-dimensional structure of trans-diborylated alkyne, showing the position of boron (yellow), oxygen (red), carbon (gray) and hydrogen (white) atoms. (phys.org)
  • Uchiyama's team investigated whether diboron-two boron atoms -could be selectively added to an alkyne to form a trans arrangement (Fig. 1). (phys.org)
  • alkane
  • Alkyne has 4 fewer hydrogens than an alkane. (slideserve.com)
  • The chiral column high-performance liquid chromatography (HPLC) method in general could not be directly used to resolve such substrates, since the differentiation of the alkyne segment with the other alkane/alkene segment is not significant in the stationary phase, and the alkyne group is not a good UV chromophore. (mdpi.com)
  • simplest
  • The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula C n H 2 n −2 . (wikipedia.org)
  • carbon
  • In organic chemistry , an alkyne is an unsaturated hydrocarbon containing at least one carbon-carbon triple bond . (wikipedia.org)
  • Alkyne is a hydrocarbon that contains a carbon-carbon triple bond. (slideserve.com)
  • Methods to form two carbon-boron bonds on the same side of an alkyne, a procedure called cis-diborylation, have been described previously," explains Uchiyama, "but trans-diborylation has not been possible. (phys.org)
  • Here, we used alkyne containing a carbon-carbon triple bond as a Raman tag for observing small molecules in live cells. (spie.org)
  • copper
  • It is also possible to form copper and silver alkynes, from this group of compounds silver acetylide is an often used example. (chemeurope.com)
  • bonds
  • The triple bond of alkynes consists of one sigma bond and two pie bonds, which are perpendicular to each other. (assignmenthelp.net)
  • In direct agreement with empirical trends, alkene insertion into Ni-C bonds on COM1 is exclusively favoured over the competing alkyne insertion. (rsc.org)
  • fluorescent
  • Yellow emitting fluorescent alkyne dye. (abcam.com)
  • Yellow emitting fluorescent alkyne dye for click chemistry reactions. (abcam.com)
  • To avoid the use of bulky fluorescent labels, we introduce a technique that uses a simple small chemical tag called alkyne consisting of two carbons connected by a triple bond. (spie.org)
  • yields
  • The solution free-energy barriers of these RDSs (30.5-38.5 kcal mol −1 ) were in quantitative agreement with their corresponding experimental yields, evidencing the reliability of the DFT results to reproduce chemical phenomena and energetic trends in real Ni-catalysed carboryne-alkene/alkyne cycloadditions. (rsc.org)
  • Raman
  • Because the alkyne signal is located in the silent region of the cell (1800-2700 cm -1 ), it does not interfere with any intrinsic cellular Raman signals. (spie.org)
  • Here, we demonstrate this technique by showing Raman images of an alkyne-tagged component of DNA in a living cell using a slit-scanning confocal Raman microscope. (spie.org)
  • Alkyne tags can maintain original properties of target molecules with providing high chemical specificity owing to its distinct peak in a Raman-silent window of biomolecules. (spie.org)
  • complexes
  • Making use of easily-prepared stable alkyne-cobalt-complexes, we developed a simple and general method by analyzing the in situ generated cobalt-complex of chiral alkynes using chiral column HPLC. (mdpi.com)
  • derivatives
  • Base-Induced Condensation of -Chloro Oxime Derivatives Furnishes Alkynes. (docme.ru)
  • Angewandte Chemie Synthetic Methods Base-Induced Condensation of a-Chloro Oxime Derivatives Furnishes Alkynes** tion of 7 a is rationalized by assuming the fragmentation of an intermediate 1-aza-2-chlorobicyclo[1.1.utane 5 a (Scheme 2). (docme.ru)