enol In A Sentence
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- Aldehydes can exist in either the keto or enol tautomers.
- Nitsosobenzene subsequently reacts with the enol-catalyst complex to afford the ( S )-N-nitroso aldol product in agreement with Pauling' s chart of electronegativity.
- This complex reaction is characterized by a keto - enol tautomerism equilibrium and ester exchange reaction.
- This keto-enol crosslink hypothesis was not developed much further.
- The acidities of phenol and acetone enol diverge in the gas phase owing to the effects of solvation.
- Aldehydes ( except those without an alpha carbon, or without protons on the alpha carbon, such as formaldehyde and benzaldehyde ) can exist in either the keto or the enol tautomer.
- Thus the mechanism was proposed to occur via attack of the protonated carbonyl with the forming enol.
- Usually the enol is the minority tautomer, but it is more reactive.
- Keto-enol or thione-thiol tautomeric equilibria of pyridinol derivatives have attracted great experimental and theoretical interests due to their significant importance to chemistry and biochemistry.
- The crystal structure analysis of photocolored product showed that the photochromic phenomenon was due to photoisomerization from enol form to keto form.
- 1-Hydroxyazulene is an unstable green oil and it does not show keto-enol tautomerism . 2-Hydroxyazulene is obtained by hydrolysis of 2-methoxyazulene with hydrobromic acid.
- The enol and keto forms are said to be tautomers of each other.
- Methods: Enzymolysis technique and alcohol was applied for decolorization, and ph enol-sulfuric-acid method was used to determine the active polysaccharide conte nt.
- Enol ethers and glycals are nucleophilic enough to be fluorinated by Selectfluor.
- The resulting mucoxyhalic acids exist as a mixture of keto and enol forms.
- The proton of the hydroxyl of the enol is removed.
- Secondary reactions that occur are intramolecular recombination of the two radicals to a substituted cyclobutane in the "'Norrish-Yang reaction "', or fragmentation to an enol and an alkene.
- Note that pyrogallol is very nucleophilic enol-- ( an aromatic enol, but still an enol )-- so another pyrogallol molecule will then attack this Michael acceptor.
- The mechanism suggests that red light is emitted from the keto form of oxyluciferin, while green light is emitted from the enol form of oxyluciferin.
- The C = C double bond with adjacent thiol gives thioenols and enedithiols their chemical characteristics, by which they present keto-enol tautomerism.
- This keto-enol tautomerization has a high barrier and does therefore not occur near room temperature.
- The Mukaiyama aldol reaction and the Sakurai reaction refer to the addition of silyl enol ethers and allylsilanes to carbonyl compounds, respectively.
- Six dimethylsilyl bis -- enol others of aldehydes are synthesized and the yields are good.
- Another organic synthetic method using silver ( I ) fluoride is the BINAP-AgF complex catalyzed enantioselective protonation of silyl enol ethers:.
- In the presence of triethylamine and lithium diisopropylamide, enolisable aldehydes, ketones and esters are converted to trimethylsilyl enol ethers.
- The enone product cyclized " in situ " to regenerate the enol and form the tetrahydropyran ring.
- Enol form is certainly capable of a better complexation to Zn A.
- Alternatively, the enol ( below right ) and ion forms are complementary to guanine.
- Thebacon is generated by the esterification product of the enol tautomer of hydrocodone ( dihydrocodeineone ) with acetic acid.
- The most recent explanation for the bioluminescence color examines the electrostatic interactions with other nearby residues, restricting oxyluciferin from tautomerizing to the enol form.
- Furthermore, the absorption spectrum of keto form and enol form obtained from TDDFT theory prove that the hypothesis of photoisomerization from enol form to keto form is reasonable.
- The enol is stabilized by conjugation with the imine, and after the attack on a second formaldehyde, a hemiacetal is created-- the alkoxide is readily stabilised by the COOH group next to it.
- The diketone 2, 4-pentanedione ( acetylacetone ) is also a weak acid because of the keto-enol equilibrium.
- After the carbon dioxide is split from the oxalosuccinate in the decarboxylation step ( below right ), the enol will tautomerize to the keto from.
- The trimethylsilyl enol ethers can also be used as masked enolate equivalents in the Mukaiyama aldol addition.
- The Keto-enol tautomerism strongly depends on the solvent used for the experiments.
- Keto and enol forms, showing the hydrogen bond between the uracil nitrogen and the guanidino hydrogen . ]].
- The formation of an enol is catalyzed by acid or base.
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