Information om | Engelska ordet DIAZOMETHANE

Exempel på hur man kan använda DIAZOMETHANE i en mening

• The reaction is thought to proceed via proton transfer from carboxylic acid to diazomethane to give a methyldiazonium cation, which reacts with the carboxylate ion to give the methyl ester and nitrogen gas.
• In contrast, most diazoalkanes without electron-withdrawing substituents, including diazomethane itself, are explosive.
• Furthermore, methyldiazonium carboxylate is believed to be an intermediate in the methylation of carboxylic acids by diazomethane, a common transformation.
• The reaction product of a cycloaddition between diazomethane and trans-diethyl glutaconate is a 1-pyrazoline.
• The preparation of the beta-amino acid from phenylalanine illustrates the Arndt–Eistert synthesis carried out with the Newman–Beal modification, which involves the inclusion of triethylamine in the diazomethane solution.
• Its behavior is akin to the reagent diazomethane, but the trimethylsilyl (TMS) analog is nonexplosive.
• Cycloheptatriene can be obtained in the laboratory by photochemical reaction of benzene with diazomethane or the pyrolysis of the adduct of cyclohexene and dichlorocarbene.
• Certain diazo compounds, such as diazomethane, can react with olefins to produce cyclopropanes in a 2 step manner.
• Cyclopropanone has been prepared by reaction of ketene with diazomethane in an unreactive solvent such as dichloromethane.
• MNNG produces diazomethane, a known methylating agent of DNA and other substrates, in basic aqueous solutions, and nitrous acid, a mutagen, in acidic solutions.
• Organic Syntheses provides the example of t-BOC protected (S)-phenylalanine (2-amino-3-phenylpropanoic acid) being reacted sequentially with triethylamine, ethyl chloroformate, and diazomethane to produce the α-diazoketone, which is then reacted with silver trifluoroacetate / triethylamine in aqueous solution to generate the t-BOC protected form of (S)-3-amino-4-phenylbutanoic acid.
• She spent eight years at Caltech, working on 3- and 4-membered ring compounds, the reactions of alcohols with diazomethane, the hydrolysis of diaryliodonium salts, the deamination of nitrous acid, and benzyne reaction intermediates in nucleophilic aromatic substitution reactions.
• In metabolic conditions, cycasin is hydrolyzed into glucose and methylazoxymethanol (MAM), the latter of which dissociates into formaldehyde and diazomethane.
• The diazoalkane employed can also determine relative yields of products by influencing migratory preferences, as conveyed by the reactions of o-nitropiperonal with diazomethane and diazoethane.
• With diazomethane hexafluorothioacetone produces 2,2,5,5-tetrakis(trifluoromethyl)-l,3-dithiolane, another substituted dithiolane.
• Photolysis of a solution of diazomethane in n-pentane gives a mixture of hexanes and higher homologues.
• Cyclic carbodiphosphoranes have also been successfully synthesised through the reaction of bis(diisopropylamino)phosphino diazomethane with bis(dialkylamino)phosphenium triflate in excess benzonitrile followed by deprotonation with hexamethyldisilazide.

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