aldehydes In A Sentence
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- Aldehydes can exist in either the keto or enol tautomers.
- They are prepared by condensing thio-amides with a-haloid ketones or aldehydes, the thio-amide reacting as the tautomeric thio-imino acid.
- They combine with aldehydes and ketones, with elimination of water and formation of mercaptals and mercaptols.
- Aliphatic conjugated and aromatic aldehydes failed to produce urticarial skin reactions with the exception of acrolein.
- Extraction in particular results in whisky acquiring a number of compounds, including aldehydes and acids such as vanillin, vanillic acid, and syringaldehyde.
- 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.
- Terminal alkynes, including acetylene itself, can react with water to give aldehydes.
- Imines are related to ketones and aldehydes by replacement of the oxygen with an NR group.
- The chief aldehydes are shown in the following table: - For formaldehyde see Formalin.
- Imines are less reactive than the corresponding aldehydes, but palladium catalysis can be used to facilitate addition into imines.
- It does not contain aldehydes, phenols or chlorine.
- In organic synthesis, TBAB can be used for selective reduction of certain functional groups including aldehydes, ketones, oximes, and imines.
- In aldehydes, the carbonyl is bonded to one carbon and one hydrogen and are located at the ends of carbon chains.
- Many alpha-amino acids and aldehydes can be used very efficiently, for a total control of the functionalization process.
- Aldehydes and to some extent even ketones, hydrate to geminal diols.
- The yields of aldehydes produced in this sequential process are comparable to the two - step method.
- The diene is known to react with amines, aldehydes, alkenes and alkynes.
- Another modification for less reactive aldehydes is made by replacement of potassium carbonate with caesium carbonate in MeOH and results in a drastic yield increase.
- Oximes are usually generated by the reaction of hydroxylamine and aldehydes or ketones.
- The Enders group utilized a triazolium-based catalyst to effect the coupling of aromatic aldehydes with chalcone derivatives with moderate yields.
- They catalyze the hydrogenation of alkenes, ketones, aldehydes.
- TERPENES, in organic chemistry, the generic name of a group of hydrocarbons of the general formula (C 5 H 8) n, and the more important oxygen derivatives, mainly alcohols, aldehydes and ketones, deriv
- Sodium borohydride is a mild reducing agent that works well in reducing aldehydes, ketones, and acid chlorides.
- Primary alcohols will be oxidised to aldehydes and not carboxylic acids.
- The hydrazones are crystalline substances which are of value in the characterization of the aldehydes.
- At first, the aldehydes reek havoc, then the jasmine gets cloying.
- These genes participate in a wide variety of biological processes including the detoxification of exogenously and endogenously generated aldehydes.
- The compound is used as a precursor to heterocyclic compounds by reaction with ketones and aldehydes.
- These compounds may be considered as 5-triazolones, a series of isomeric 3-triazolones resulting from the condensation of phenylsemicarbazide with aromatic aldehydes in the presence of an oxidant.
- Aldehydes reduce dichromate from the + 6 to the + 3 oxidation state, changing color from orange to green.
- They are nitrates produced in the thermal equilibrium between organic peroxy VOCs ), or by aldehydes and other oxygenated VOCs oxidizing in the presence of NO 2.
- Aldehydes, alcohols, esters and olefins were the major constituents in Granny Smith apple.
- Diphenylborinic acid can catalyse the condensation of pyruvic acids with aldehydes to yield substituted isotetronic acid.
- In addition, CBR1 inactivates lipid aldehydes during oxidative stress in cells.
- It condenses readily with aldehydes, yielding with formaldehyde, on the addition of.
- Aldehydes and formic acid ( and formic acid esters ) also give a positive test.
- MTO also catalyses the conversion of aldehydes and diazoalkanes into an alkene, and the oxidation of amines to " N "-oxides with sodium percarbonate.
- Aldehydes are characterized by the reddish-violet colour which they give with a solution of fuchsine that has been decolorized by sulphurous acid (H.
- A commercially available dihydro-1, 3-oxazine is a reagent in the Meyers synthesis for aldehydes.
- Retention values for aliphatic alcohols, aldehydes, acids and esters are correlated with these parameters.
- Virtually, all ketones and aldehydes are highly odorous.
- The aldehydes are characterized by their great chemical reactivity.
- Lysyl oxidase reacts with specific lysine residues and by oxidative deamination generates reactive aldehydes and allysine.
- "' Asymmetric addition of alkynylzinc compounds to aldehydes "'is an enantioselective chemical reaction where alkynylzinc reagents react with aldehydes to generate propargyl alcohols.
- A series of imine esters were synthesised by the addition of amino acid esters to aldehydes.
- The reactions of thiazole ethiodide with aromatic aldehydes in the presence of pipcridine as catalyst were investigated. It is found that the reaction is of second order.
- The various methods for the umpolung of carbonyl compounds (aldehydes and ketones), secondary amines and the most frequently used umpolung reagents are introduced.
- In the case of aromatic aldehydes, acids are also obtained by means of " Cannizzaro's reaction " (see Benzaldehyde).
- In the presence of triethylamine and lithium diisopropylamide, enolisable aldehydes, ketones and esters are converted to trimethylsilyl enol ethers.
- Of the benzene derivatives that do not undergo the Baudisch reaction, aromatic aldehydes tend to form hydroxamic acid or oximes.
- The electrooxidation of ceric salts , the synthesis of aromatic aldehydes and the problems of this method in commercial production are all discussed.
- The molecule is structurally related to other aromatic aldehydes such as benzaldehyde and vanillin.
- The condensation of carbamates with aldehydes under the catalyzing of acids affords alkylene dicarbamate or monocarbamate in good yields.
- The oxime-" O "-sulfonic acids of aldehydes react above room temperature upon elimination of sulfuric acid in high yields to nitriles.
- The calcium salts distilled with calcium formate yield aldehydes r distilled with soda-lime, ketones result.
- Y-Oxyacids are formed when aldehydes are heated with sodium succinate and sodium acetate.
- Another route starts with aliphatic and aromatic aldehydes reacting with iodine azide which is formed from sodium azide and iodine monochloride in acetonitrile.
- Soc. chim., 1904 [31, 31, p.1306) prepares aldehydes by the gradual addition of disubstituted formamides (dissolved in anhydrous ether) to magnesium alkyl haloids, the best yields being obtained by th
- In organic chemistry, his study of the ketones and aldehydes, begun in 1857, provided him with the subject of his other doctoral thesis.
- His thesis, " Equimolecular Condensation of aldehydes with Phenols " was published in the Journal of the American Chemical Society ( JACS ) in 1937.
- Three new asymmetric bis-Schiff bases containing thiocarbohydrazide were synthesized by the reaction of thiocarbohydrazide with ketone and different aldehydes step by step.
- For example, methanal, ethanal and propanone - the common small aldehydes and ketones - are miscible with water in all proportions.
- Six dimethylsilyl bis -- enol others of aldehydes are synthesized and the yields are good.
- The convention applies when propionate ( or higher order ) nucleophiles are added to aldehydes.
- Rovis and coworkers subsequently went on to explore the asymmetric intermolecular Stetter reaction of heterocyclic aldehydes and nitroalkenes.
- Aldehydes are organic compounds of carbon, oxygen and hydrogen.
- It can be transformed back into a visible work with aldehydes.
- Saturated hydrocarbons can burn to aldehydes, alcohols to organic acids, and aromatics to unsaturated compounds which are pungent and irritating.
- This reaction is unusual because in general aldehydes will self-condense.
- The phase transfer catalyzed Wittig reaction of allyl diphenyl phosphonium salt with substituted aromatic aldehydes using potassium carbonate as base provides 1, 3-dienes with good E-selectivity.
- In No . 19 Poudr? the sharp galbanum and aldehydes of the original are dialed back, and sweeter neroli and iris take their place.
- Progress in pinacol coupling of aldehydes and ketones using low valent titanium is reviewed in recent years.
- Aldehydes with no ?-hydrogens can undergo the Tishchenko reaction.
- Selective mono-alkylations by acid-labile, substituted benzhydryl chlorides, followed by reductive alkylations with Fmoc-protected amino aldehydes are employed to assemble the polyamine backbone.
- The characteristic flavour and odour of wines and spirits is dependent on the proportion of higher alcohols, aldehydes and esters which may be produced.
- Electroless nickel plating uses hypophosphite as the reducer while plating of other metals like silver, gold and copper typically use low molecular weight aldehydes.
- The compound has been used as a reagent for the colorimetric detection of aldehydes.
- The allylic transfer reaction of 6-methyl-6-phenyl-oct-7-ene-1,5-diol with various aliphatic aldehydes and aromatic aldehydes was studied, and the influence of solvent was investigated.
- Tetrahydro-oxazoles or oxazolidines result from the action of aldehydes on amino-alcohols (L.
- Schiff bases can be obtained by reacting amines with ketones or aldehydes.
Similar words: Aldfrith, Aldridge Brownhills, Aldus, Aldwinkle, Aldea, Aldrich, Aldham, Aldose, Aldimine, Aldwin, Aldgate, Aldosteronism, Alde, Aldeburgh, Aldegonde, Aldine, Aldington, Ald, Aldos, Alduino